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哈尔滨南岗妇产医院网上预约当当面诊黑龙江省电力医院可以做人流吗

来源:搜医热点    发布时间:2019年10月22日 02:33:52    编辑:admin         

经典:(59) 道谢 -01-7 18:5:51 来源: 道谢谢谢! Thank you. *在欧美日常生活中,不能忘记对别人表示感谢Thank you. (谢谢!)You're welcome. (不客气) 多谢! Thanks. *比Thank you.较随便些 非常感谢! Thank you very much. *比Thank you.要有礼貌Thanks a lot.Thank you so much. 真是非常感谢 Much appreciated. Thank you. *appreciate “感激”、“感谢”,多在美国南部使用I appreciate it. 谢谢您的好意 Thanks your kindness.That's very nice of you.That's very kind of you.How kind of you. 非常感谢你的关怀 I appreciate your kindness.I appreciate your kindness. (非常感谢你的关怀)Don't mention it. (别客气) 我无法表达对您的感谢I can't thank you enough.I can't thank you enough. (我无法表达对您的感谢)You're quite welcome. (您太客气了)真不知如何感谢你的关心I can hardly thank you enough your kindness. *hardly常常和can、could构成否定的形式表示“根本不能……”、“难以……”和barely意思大致相同I have no words to thank you. (不知说什么才能感谢您)I can't express how grateful I am. (不知如何表达谢意)你帮了我大忙了You've been very helpful.You've been a big help. (你帮我大忙了)You've been a great help. (你帮我大忙了) 谢谢你的帮助Thank you the help.Thank you the help. (谢谢你的帮助)My pleasure. (没什么)Thank you helping me. (谢谢你对我的照顾)I appreciate your help. 耽误您时间,实在对不起 Thanks your time.Thanks your time. (耽误您时间,实在对不起)Don't worry about it. (没关系) 感谢您为我做的一切 Thanks everything.Thanks all you've done.Thank you all of your kindness. 不管怎么都要谢谢您Thank you anyway. *对方虽好意相助,但终究没有起到作用时使用Sorry, I don't know. (对不起,我不知道)Thank you anyway. (不管怎么都要谢谢您)Thanks offering, but... (谢谢你的建议,但是……)Thanks offering, but I have other plans. (谢谢您的建议,可是我们有其他计划) 哦!那太好了How nice!It's on me. (这次我请客)Oh! How nice! (哦!那太好了)How lovely! *女性常用What a treat! 我欠你的情I owe you one.I'm much obliged. (万分感谢)*比较礼貌的说法be obliged表示“感谢,感激”,多在美国南部使用I'm in your debt. *in one's debt “向……借过钱”,引申为“受……的恩惠”,比较强调感谢的心情 谢谢你送给我的礼物Thanks a lot your present.Thank you your gift. 您能这样说,我非常感谢 Thanks saying so.I really like your apartment. (我真的喜欢你的公寓)Thanks saying so. (您能这样说,我非常感谢)It's nice of you to say so. 谢谢你告诉我 Thanks telling me.You have a run in your stocking. (你的丝袜跳线了)Thanks telling me. (谢谢你告诉我)Thanks letting me know. 非常感谢你等着我 Thanks waiting me.Sorry to have kept you waiting. (对不起,让你久等了)Sorry, I'm late. (对不起,我晚了) 谢谢你约我出来Thanks asking me out. *ask someone out 一般是“约会”的意思Thanks inviting me. (谢谢您邀请我) 谢谢你鼓励我 Thanks cheering me up. *cheer up “鼓励”、“打起精神”、“鼓足勇气”Thank you making me feel better. 你救了我一命 You saved my life.Watch out! Stop! (小心!站住!)Thanks, you saved my life. (谢谢,你救了我一命) 谢谢你对我的忠告Thanks warning me.Thanks the warning.Thanks telling me. (谢谢你告诉我) 谢谢你不远万里专程跑一趟 Thanks coming all the way over here.Thanks coming all the way over here. (谢谢你大老远专程跑一趟)It was no trouble. (这没什么大不了的) 谢谢你的来信,你对我太好了 Thank you your letter. It was very kind of you.Thank you your letter. It was very kind of you. (谢谢你的来信,你对我太好了)You're welcome. (这没什么) 英语口语 经典 谢谢 Thanks。

【英语达人分享】如何快速提高英语口语 -- :00:37 来源:   英语学习,无非就是听、说、读、写四项能力听力、阅读和写作国人都很擅长,但唯独口语成为大多数人的噩梦究其原因,一方面是国人学习英语多作应试之用,应试注重听力、阅读和写作,唯独口语不做考试,中国学生的口语表达能力都非常有限二是因为英语母语环境的缺失没有口语练习的对象和机会,口语能力自然无法提高  随着我国经济发展,我国和西方的交流也随之扩大,用英语交流成为大学生和职场人士一项不可或缺的技能但如上所说,口语已成为国人对外交流的一大阻碍那么,如何才能在短时间内提高自己的英语口语呢?  其实,英语口语无非就是三个问题:怎么说,说什么,和谁说怎么说是英语发音问题,说什么就是你所说的内容,和谁说是你与谁交流英语首先明确这三个步骤,然后一步一步扎实去做,那么你的英语口语定会有一个系统的提升  一、怎么说;;英语发音 第1周-第3周  很多人在刚开始学习英语的时候,由于没有系统的学习音标,或是受到老师的影响,发音就有问题在真正的系统练习口语前,我们首先应当纠正我们的发音  1)首先认真学习音标元音、辅音、清辅音等概念最好弄清楚,同时,在学习音标的过程中,要注意每个音标发音时舌头、嘴唇的形状、声带震动以及鼻腔用音等细节大一口语课的时候,我的老师会让我们对着镜子练习发音通过镜子观察自己的嘴型及舌头位置,在不断的纠正中,发音才能更为准确在音标教辅材料选择方面,最好的选择是B Learning English,里面有针对英语发音的详尽教程  )学习完音标之后,就进入了练习阶段了除去每个单词的发音外,我们还要知道单词轻重音、句子节奏、句子轻重音等在这个阶段,最重要的是模仿跟读,除过B Learning English之外,还推荐Englishpod,这两个节目都是正常语速且有讲解,比较适合初学者,若是前期学习时间充分,可每天听一个小时左右,半个小时认真听,另半小时跟读  3)有了前面的基础之后,可再花一个星期提高自己的发音及语感在此阶段,可以选择《American Accent Training作为教材模仿跟读,同时也可选择英美剧进行跟读,在选择影视剧跟读之前,最好打印出一份文本,扫清所有的生词后再听更有效果  )另外如果有条件的话,可以找个外教来练一练,可能大家不知道,现在网上很多资源可以用,推荐一个阿卡索外教网,有免费提供的外教一对一的课程http:www.acadsoc.com.cnrwlp6,还有姚明代言的那个VIPA,都可以试试这部分先粗略的说说,后面会再细说  二、说什么;;第周-第8周  三周时间解决发音问题之后,就进入到说什么阶段,这也是英语口语最为重要,也是最难攻克的一个阶段在说明提高方法之前,我们首先需要明确这样一个概念:所有的语言学习都是一个从输入到输出的阶段听力和阅读属于输入,口语和写作则属于输出若是没有输入,输出自然也就是无水之源很多人平时不做听力及阅读练习,在说的时候,自然无法输出有效的内容那么,应该如何提高英语输入的效率呢?  1)单词如果说英语学习是一座金字塔,那单词就是堆成金字塔的砖石大学公共英语六级考试要求掌握的单词数量大致为5500个,GRE需要掌握核心单词数量大致为000个,在日常生活中,我们应当至少掌握7000个单词,才能与英语母语者做到基本的无障碍沟通我推荐通过阅读来记忆单词,遇到不懂的单词,用英英词典去查,然后记到单词本上通过语境的单词记忆,远比背单词书更有效率阅读的材料可以是《Economist等杂志,一些英文原版书,如《The Little Prince,《Charlottelsquo;s web也都不错如果时间紧,想要立竿见影,那可选择《天搞定GRE单词、《新口语词汇小伴侣这两本书选择搭配背诵 记忆单词的生词本最好是比较厚而且体积较小的本子,这样可以利用碎片化时间随时拿出来进行记忆  )英美剧这个方法很多人都用,但大多数人没有好好利用这个方法首先在选择英美剧的时候,一定要选择贴近英美生活,同时语言可以直接使用的那种,在这里比较推荐《Modern Family或者《Friends这两部剧的对白简单而地道,适合入门级的人多加学习  在选择好剧目之后,下面就是如何看的问题了,我在看英美剧的时候,基本有以下几个步骤:  i. 首先选择好几集英美剧,然后将台词都记录起来,做成一个属于自己的剧本(如果想偷懒,可以直接在网上下剧本)在看的时候可以多看几遍字幕,务必先把剧情台词都熟悉起来  ii. 熟悉之后,就可以看剧本了遇到不懂的语句或单词,直接用英英字典查清,然后做好记录觉得生活中常用的,十分地道的语句也可以记录下来把记录下来的语句时时多看,做到烂熟于心  iii. 在熟悉了剧情和剧本之后,再回头去看,看的时候将字幕遮挡住如果还是遇到没听懂的地方,可以查看字幕,然后再做一遍记忆到这一步的时候,你对其中的对话都非常熟悉了,基本可以达到学以致用的效果  iv. 以上几步做完之后,可以再继续做跟读训练跟读不仅可以加深记忆,对于语境的理解及发音都有很大的帮助  3)英语思维在我们讲英语口语的时候,我们的思维逻辑为:英文;;中文;;中文;;英文在英文的交流中,中文充当了一个桥梁的作用对于初级英语学习者而言,中文是必经之路,但对于一个高阶的口语者而言,中文反而会成为一个阻碍在经过单词以及英美剧的训练之后,就应及时转入英语思维  英语思维并非一蹴而就,而是一个从量变到质变的内化过程在词汇、语法、逻辑、英美文化有了足够多的积累之后,我们的大脑才不用经过中文翻译,而是直接下意识的说出英文在这个时候,你的英语才能够真正进入到fluent的阶段  三、和谁说;;第9周-第周  做好了英文输入,下面就到了真正输出的阶段了很多人的发音和知识积累已经非常丰富了,但是苦于没有对话的人以及环境,所以开口的机会非常少但互联网的发展,给了我们和国外友人交流的机会,像上面提到的阿卡索外教网就是个例子,想学好口语的,一定要去免费体验下:http:www.acadsoc.com.cnrwlp6,大家在跟外教对话时候,切记不要害羞,尽可能的多说,说错了也没关系,外教老师会帮你纠正的  除这种线上形式外,线下也有很多机会例如每个大学都会有英语角,若是有时间,可以每周过去和英语角的学生交流另外,外国语大学相比一般的大学,都会有数量更多的留学生这些留学生为了学习汉语或是宣传宗教,也会主动找我们聊天,去外国语大学找留学生,你练习口语的机会也会更多一些  如果实在找不到外国人练习口语,那么也可以找一个英语好的国人作为替代,几个人坚持用英语作为母语,并进行日常对话只要持之以恒,也会有很不错的效果  在练习口语的时候,一是不要害羞,要大胆的讲出来二是如果真的不熟练可以先用单词或者短句代替,待略微熟练之后,再强化语句部分只有真正的学以致用,同时在情境中练习,英语口语才能完成最后的收割阶段  以上就是我三个月的口语练习计划,在照上述计划行动之后,我基本可以做到和外国人无障碍沟通当然,每个人的英语基础有所不同,也不必严格照以上步骤去实施,例如有的人发音标准,那么就可以减少音标的学习,直接进入第二、第三阶段  英语口语学习是一个持之以恒的过程,虽然方法很多,但最重要的还是找准合适自己的,然后去认真执行三个月或许还无法让你像native speaker那样流利的说口语,但足以应付一般的工作或是聊天当你能够真正与外国人谈笑风生的时候,你收获的不仅是他人艳羡的眼光,更有你对英语学习的重新思考与认知,这将使你的英语学习之路,走的比别人更快,也更长 英语口语 快速提高。

My father was a self-taught mandolin player. He was one of the best string instrument players in our town. He could not music, but if he heard a tune a few times, he could play it. When he was younger, he was a member of a small country music band. They would play at local dances and on a few occasions would play the local radio station. He often told us how he had )auditioned and earned a position in a band that featured Patsy Cline as their lead singer. He told the family that after he was hired he never went back. Dad was a very religious man. He stated that there was a lot of drinking and cursing the day of his audition and he did not want to be around that type of environment.Occasionally, Dad would get out his mandolin and play the family. We three children Trisha, Monte and I, George Jr., would often sing along. Songs such as the Tennessee Waltz, Harbor Lights and around Christmas time, the well-known 3)rendition of Silver Bells. "Silver Bells, Silver Bells, its Christmas time in the city" would ring throughout the house. One of Dad's favorite )hymns was "The Old Rugged Cross". We learned the words to the hymn when we were very young, and would sing it with Dad when he would play and sing. Another song that was often shared in our house was a song that accompanied the Walt Disney series Davey Crockett. Dad only had to hear the song twice bee he learned it well enough to play it. "Davey, Davey Crockett, King of the Wild Frontier" was a favorite song the family. He knew we enjoyed the song and the program and would often get out the mandolin after the program was over. I could never get over how he could play the songs so well after only hearing them a few times. I loved to sing, but I never learned how to play the mandolin. This is something I regret to this day.Dad loved to play the mandolin his family he knew we enjoyed singing, and hearing him play. He was like that. If he could give pleasure to others, he would, especially his family. He was always there, sacrificing his time and efts to see that his family had enough in their life. I had to mature into a man and have children of my own bee I realized how much he had sacrificed.I joined the ed States Air ce in January of 196. Whenever I would come home on leave, I would ask Dad to play the mandolin. Nobody played the mandolin like my father. He could touch your soul with the tones that came out of that old mandolin. He seemed to shine when he was playing. You could see his pride in his ability to play so well his family.When Dad was younger, he worked his father on the farm. His father was a farmer and 5)sharecropped a farm the man who owned the property. In 1950, our family moved from the farm. Dad had gained employment at the local 6)limestone 7)quarry. When the quarry closed in August of 1957, he had to seek other employment. He worked Owens Yacht Company in Dundalk, Maryland and Todd Steel in Point of Rocks, Maryland. While working at Todd Steel, he was involved in an accident. His job was to roll angle iron onto a 8)conveyor so that the 9)welders farther up the production line would have it to complete their job. On this particular day Dad got the third index finger of his left hand mashed between two pieces of steel. The doctor who operated on the finger could not save it, and Dad ended up having the tip of the finger )amputated. He didn't lose enough of the finger where it would stop him picking up anything, but it did impact his ability to play the mandolin.After the accident, Dad was reluctant to play the mandolin. He felt that he could not play as well as he had bee the accident. When I came home on leave and asked him to play he would make excuses why he couldn't play. Eventually, we would )wear him down and he would say "Okay, but remember, I can't hold down on the strings the way I used to" or "Since the accident to this finger I can't play as good". the family it didn't make any difference that Dad couldn't play as well. We were just glad that he would play. When he played the old mandolin it would carry us back to a cheerful, happier time in our lives. "Davey, Davey Crockett, King of the Wild Frontier", would again be heard in the little town of Bakerton, West Virginia.In August of 1993 my father was )diagnosed with )inoperable lung cancer. He chose not to receive )chemotherapy treatments so that he could live out the rest of his life in dignity. About a week bee his death, we asked Dad if he would play the mandolin us. He made excuses but said "okay". He knew it would probably be the last time he would play us. He )tuned up the old mandolin and played a few notes. When I looked around, there was not a dry eye in the family. We saw bee us a quiet humble man with an inner strength that comes from knowing God, and living with him in one's life. Dad would never play the mandolin us again. We felt at the time that he wouldn't have enough strength to play, and that makes the memory of that day even stronger. Dad was doing something he had done all his life, giving. As sick as he was, he was still pleasing others. Dad sure could play that Mandolin! 5。

希望和愿望(1) -01-7 00:: 来源: 在日常生活中我们常常会碰到某些要表达自己希望或者愿望的场合,下面就介绍一些生活中的常用句型:I hope our monitor is better.当我们希望某人现状比较好或者身体好的话可以用这类句子,再比如:I hope our monitor is all right now. 我希望班长已经一切正常Your family are quite well, I hope. 我希望你全家都好希望天气好也可以这样说,例如:— Will it snow tomorrow? 明天会下雪吗?— I hope not.我可不希望下雪We hope an early spring. 我们希望春天早点儿来这类句子还可以表示“希望事情如愿”,例如:In this I hope your help.这件事我希望能得到你的帮助Hope the best and prepare the worst. 希望得到最好结果,准备应付最坏的情况年夏天全国出现旱情,我们就可以说:After the dry weather everyone hopes rain. 旱季之后人人都希望降雨I hope to hear from you soon.Hope to do something 意为“希望做某件事”,例如:当与朋友见面时她情绪不太好时你可以说:I hope to find you in better spirits when we meet again. 我希望再次见面时你情绪好些当你要出远门,家人问你什么时候能回家而你又不确定时可以说:I hope to be back tomorrow night. 我希望明晚回来再比如:I hope to have finished the work by now. 真希望现在工作已经结束了We can’t hope to win an easy victory. 我们不能指望轻易取胜—I hope very much to go to the exhibition. 我非常希望去参观展览会—So do I. 我也一样What is it you want me to do?Want someonesomething+to do的意思是“想要某人、某物做某事如:当你想和朋友一道去做什么事的时候,可以说 Don’t you want someone to go along with you? 难道你不想有人和你一道去?当有不好的事情发生的时候,你要表示愤怒和希望,可以说I don’t want such a thing to happen again. 我不希望这种事再次发生也可以用来表示良好的愿望和祝福,如We wanted this meeting to be a successful one. 我们希望这次会议成功还可以用来提出自己的建议,如I want you to think it over bee you make a decision. 我希望你做决定前仔细考虑一下I want you to see him without delay. 我希望你立即见他We don’t want you getting into trouble.want 是最常用的表示自己想要做什么的词,Want someone doing something 意为“想要,希望,愿意某人(正在,不断)做某事”,如:I don’t want people playing the piano at all hours of the day and night! 我不希望人们日日夜夜都不停地弹钢琴当心情不好,不想听爸爸妈妈唠叨的时候你可以说:Who wants you thinking about me? 谁要你考虑我?I wouldn’t want an old man like you interfering in my affairs. 我不愿意像你这样的老人干涉我的事务不过这些话可是很伤人的,所以尽量不要说哦!(重庆工商大学通讯员郭峰供稿 英语点津 Annabel 编辑) 愿望 希望 hope 可以。

回首那个糟糕的夏天,我很快就明白了,所有后来出现的好事只不过与坏事相互抵消比一般情况糟糕的境遇不会延宕过久;而太平时光是我应得的,我要尽情享受,它们为我注入活力以应对下一个险情,并确保我可以兴旺发达The 50-Percent Theory of Life I believe in the 50-percent theory. Half the time things are better than normal; the other half, they are worse. I believe life is apendulumswing.It takes time and experience to understand what normal is, and that gives me the perspective to deal with the surprises of the future.我信奉对半理论生活时而无比顺畅,时而倒霉透顶我觉得生活就像来回摆的钟摆读懂生活的常态需要时间和阅历,而读懂它也练就了我面对未来的生活态度 Let’s benchmark theparameters yes, I will die. I’ve dealt with the deaths of both parents, a best friend, a beloved boss and cherished pets. Some of these deaths have been violent, bee my eyes, or slow and agonizing. Bad stuff, and it belongs at the bottom of the scale.让我们确定一下好坏的标准:是的,我注定会死去我已经经历了双亲,一位好友,一位敬爱的老板和心爱宠物的死亡有些突如其来,近在眼前,有些却缓慢痛苦这些都是糟糕的事情,它们属于最坏的部分Then there are those high points romance and marriage to the right person; having a child and doing those Dad things like coaching my son’s baseball team,paddlingaround the creek in the boat while he’s swimming with the dogs,discovering his compassion so deep it manifests even in his kindness to snails, his imagination so vivid he builds a spaceship from a scattered pile of Legos.生活中也不乏高潮:坠入爱河缔结良缘;身为人父养育幼子,诸如训练指导儿子的棒球队,当他和在小河中嬉戏时摇桨划船,感受他如此强烈的同情心-即使对蜗牛也善待有加,发现他如此丰富的想象力-即使用零散的乐高玩具积木也能堆出太空飞船 But there is a vast meadow of life in the middle, where the bad and the good flip-flop acrobatically. This is what convinces me to believe in the 50-percent theory.但在生活最好与最坏部分之间有一片巨大的中间地带,其间各种好事坏事像耍杂技一样上下翻滚,轮番出现这就是让我信对半理论的原因 7。

If we can recognize that change and uncertainty are basic principles, we can greet the future and the transmation we are undergoing with the understanding that we do not know enough to be pessimistic. 7979。

Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small ps that are in constant motion. A useful theory, in addition to explaining past observations, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists' predictions, the theory is supported.If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected. Science involves imagination and creative thinking as well as collecting inmation and perming experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said,"Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house." Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are mulated. These possible solutions are called hypotheses. In a way, any hypothesis is a leap into the unknown. It extends the scientist's thinking beyond the known facts. The scientist plans experiments, perms calculations, and makes observations to test hypotheses. Without hypothesis, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories. 086。

成功的首要条件和最大秘诀就是:把你的精力,思想和资本全都集中在你正从事的事业上一旦开始从事某种职业,就要下定决心在那一领域闯出一片天地来;做这一行的领导人物,采纳每一点改进之心,采用最优良的设备,对专业知识熟稔于心The Road to SuccessIt is well that young men should begin at the beginning and occupy the most subordinate positions. Many of the leading businessmen of Pittsburgh had a serious responsibility thrust upon themat the very threshold oftheir career. They were introduced to the broom, and spent the first hours of their business lives sweeping out the office. I notice we havejanitorsand janitresses now in offices, and our young men untunately miss thatsalutarybranch of business education.But if by chance the professional sweeper is absent any morning, the boy who has the genius of the future partner in him will not hesitate to try his hand at the broom.It does not hurt the newest comer to sweep out the office if necessary. I was one of those sweepers myself.Assuming that you have all obtained employment and are fairly started, my advice to you is “aim high”. I would not give a fig the young man who does not aly see himself the partner or the head of an important firm.Do not rest content a moment in your thoughts as head clerk, or eman, or general manager in any concern, no matter how extensive. Say to yourself, “My place is at the top.” Be king in your dreams.And here is the prime condition of success, the great secret concentrate your energy, thought, and capital exclusively upon the business in which you are engaged. Having begun in one line, resolve to fight it out on that line, to lead in it, adopt every improvement, have the best machinery, and know the most about it.The concerns which fail are those which havescatteredtheir capital, which means that they have scattered their brains also. They have investments in this, or that, or the other, here there, and everywhere. “Don’tput all your eggs in one basket.” is all wrong. I tell you to “put all your eggs in one basket, and then watch that basket.” Look round you and take notice, men who do that not often fail. It is easy to watch and carry the one basket. It is trying to carry too many baskets that breaks most eggs in this country.He who carries three baskets must put one on his head, which is apt to tumble and trip him up.One fault of the American businessman is lack of concentration.To summarize what I have said aim the highest; never enter a bar room; do not touch liquor, or if at all only at meals; neverspeculate; never indorse beyond your surplus cash fund; make the firm’s interest yours; break orders always to save owners; concentrate; put all your eggs in one basket, and watch that basket; expenditure always within revenue; lastly, be not impatient, as Emerson says, “no one can cheat you out of ultimate success but yourselves.” 751。

The Microscopic Technique Each advance in microscopic technique has provided scientists with new perspectives on the function of living organisms and the nature of matter itself. The invention of the visible light microscope late in the sixteenth century introduced a previously unknown realm of single celled plants and animals.In the twentieth century, electron microscopes have provided direct views of viruses and minuscule surface structures. Now another type of microscope, one that utilizes x rays rather than light or electrons, offers a different way of examining tiny details; it should extend human perception still farther into the natural world.The dream of building an x ray microscope dates to back 1895; its development, however was virtually halted in the 190's because the development of the electron microscope was progressing rapidly. During the 190's, electron microscopes routinely achieved resolution better than that poss ible with a visible light microscope, while the permance of x ray microscopes resisted improvement. In recent years,however, interest in x ray microscopes has revived,largely because of advances such as thedevelopment of new sources of x ray illumination. As a result, the brightness available today is millions of times tha t of x ray tubes, which, most of the century, were the only available sources of soft x rays.The new x ray microscopes considerably improve on the resolution provided by optical microscopes. They can also be used to map the distribution of certain chemical elements. Some can m pictures in extremely short times; others hold the promise of special capabilities such as three dimensional imaging. Unlike conventional electron microscope, x ray microscope enables specimens to be kept in air and in water, which means that biological samples can be studied under conditions similar to their natural state. The illumination used, so called soft x rays in the wavelength range of twenty to ty angstroms (an angstrom is one ten billionth of a meter), is also sufficiently penetrating to image intact biological cells in ma ny cases. Because of the wavelength of the x rays used,soft x ray microscopes will never match the highest resolution possible with electron microscopes. Rather, their special properties will make possible investigations that will complement those permed with light and electron based instruments. 6。

thriftthe habit of saving money and spending it carefully so that none is wasted 节约;节俭She learned from her father the virtues of hard work and thrift. 她从她父亲身上学到苦干和节俭的美德.contradictorycontaining or showing a contradiction 相互矛盾的;对立的;不一致的 We are faced with two apparently contradictory statements. 我们面前这两种说法显然是矛盾的.The advice I received was often contradictory. 我所得到的建议常常是相互矛盾的.in the mainused to say that a statement is true in most cases 大体上;基本上 The service here is, in the main, reliable. 这里的务基本上是可靠的. 93576。