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科技语篇1:

纳斯达克是英文缩写“NASDAQ”的音译名,全称是美国“全国证券交易商协会自动报价系统”。它建于1971年,是世界上第一个电子化证券市场。纳斯达克是以技术股为主的股票交易市场,从建立之初就同英特尔等高技术公司结下了不解之缘。英特尔公司1971年10月13日在这家市场上发行了原始股,这不仅使英特尔筹集到820万美元资金,而且投资者和英特尔的职工共同拥有公司的股票和股票期权,使英特尔成为硅谷利用股票期权激励职工生产积极性的先驱。从那一天起,美国电脑及相关产业的命运便紧密地同股票市场联系在一起了。

作为对美国证券交易史的贡献之一,纳斯达克允许迅速成长的高技术公司在取得第一笔收入之前挂牌上市。这不仅有利于高技术公司筹集所需资金,加速了电脑及相关产业的发展,同时也为纳斯达克自身的发展打下了基础。

纳斯达克市场初期交易的股票被看作是投资商自由买卖的非上市证券,因而不被人们重视。但由于它能够比其他证券市场更快地为公司筹措资金,在很短的时间内就吸引了一批取得成功的公司,因此声望大增。目前在纳斯达克挂牌交易的公司已有近5千家,市场资本达4万亿美元。

《华尔街日报》的文章指出,纳斯达克证券市场刺激了美国高技术的繁荣,而高技术的发展反过来推动了纳斯达克指数的攀升。如果没有纳斯达克,硅谷的高技术公司就不可能那样容易地筹得资金,美国的高技术繁荣就会推迟到来,或者根本就不会出现。可以说,纳斯达克的发展与美国高技术产业的成长是相辅相成的。(596字)

科技语篇2:

我们听不到的声音

一名男子驾车在亚利桑那州一条又长又直的公路上行驶。突然,汽车开始向公路的另一边滑去。一辆迎面驶来的卡车不断亮起前灯,拼命按着喇叭,但是不起任何作用。接着便是一阵令人心惊肉跳的撞击声,卡车几乎被撞出公路,小车司机当场死亡。亚利桑那公路警察很快赶到现场,随即提出一个个显然该问到的问题。酒后驾车?不是。吸毒?不是,验尸结果没有显示任何吸毒迹象。药物作用?不是,死者妻子非常肯定,死者生前未吃过任何可能会对他发生影响的药物。是睡着了?不是,前一天的晚上他睡了七个半小时,而且他毕竟是富有经验的驾驶员。是天气不好吗?不是,那

是一个温和的秋天。汽车有毛病吗?就警察所知,那辆小汽车的机械状况良好。但是,有一点情况倒是值得注意:那是一辆新车,那名男子以前从未开过那辆车。那么,究竟是什么原因造成了这场车祸呢?

亚声是人的耳朵听不到的一种声音,因为人的耳朵听不见频率低于每秒30周左右的震荡(也无法听到频率高于每秒22000周左右的震荡)。机动车在持续高速行驶时会产生听得见的声音,但同时也会产生介于每秒10-20周震动的亚声。这种声音我们听不到,但却能对我们产生影响。英国声学学会最近报告说,这种亚声能导致“快感、莽撞、低效率以至晕眩”,具体后果取决于具体的车、路面和人。确切地说,你有可能“醉声”。那就是亚利桑那公路上的那名男子发生的情况吗?也许是的,但他的这个事件我们是永远也不会弄清楚的。(589字)

外文文献及翻译

外文文献及翻译 题目:利用固定化过氧化氢酶 回收纺织品漂染的废水 专业食品科学与工程 学生姓名梁金龙 班级B食品072 学号0710308119 指导教师郑清

利用固定化过氧化氢酶回收纺织品漂染的废水 Silgia A. Costa1, Tzanko Tzanov1, Filipa Carneiro1, Georg M. Gübitz2 &Artur Cavaco-Paulo1,? 1纺织工程系, 米尼奥大学, 4810吉马尔, 葡萄牙 2环境生物技术系, 格拉茨技术大学, 8010格拉茨, 奥地利 ?作者联系方式(Fax: +351 253 510293; E-mail: artur@det.uminho.pt) 关键词:过氧化氢酶的固定化,酶稳定,过氧化氢,纺织印染 摘要 过氧化氢酶固定在氧化铝载体上并用戊二醛交联,在再循环塔反应器和CSTR反应器中研究贮存稳定性,温度和pH值对酶的活性。固定化酶的在的活性维持在44%,pH值11(30?C),对照组是活性为90%,pH值7(80?C),过氧化氢酶固定化的半衰期时间被提高到2小时(pH12,60?C)。用过氧化氢漂白织物后,洗涤过程中的残留水被固定化酶处理,可以用于再次印染时,记录实验数据。 1 序言 由于新的法规的出台,从生态经济的角度来看(Dickinson1984年),对于纺织行业中存在的成本和剩余水域的污染问题,必须给予更多的关注。过氧化氢是一种漂白剂,广泛应用于工业纺织工艺(Spiro & Griffith1997年)。在去除H2O2时,会消耗大量的水和能源(Weck 1991, St?hr & Petry 1995),以避免对氧气敏感的染料(Jensen 2000)产生后续问题。过氧化氢酶可用于降低过氧化氢的含量(Vasudevan & Thakur 1994, Emerson et al. 1996),从而减少水分消耗或方便回收印染洗涤液。过氧化氢酶的使用主要问题出在漂白时温度和清洗液碱度过高。以前,我们试图通过筛选新的嗜热嗜碱的微生物(Paar et al. 2001)或使用不同的酶稳定剂(Costa et al. 2001)来解决此问题。但是染料与蛋白质之间的潜在相互作用(Tzanov et al. 2001a, b)表明,可溶性过氧化氢酶的使用是不恰当的。固定化过氧化氢酶的使用还有一种选择(Costa et al. 2001, Amar et al. 2000)。在这项研究中,我们对氧化铝进行共价固定并使用戊二醛作为交联剂,这种方法在商业中得到验证。本项研究的目的就是探讨过氧化氢酶的固定化动力学,及其稳定性和工艺条件,这将使我们能够应用此系统,以处理可能被用于清洗染色的反复使用的酒。 2 材料和方法 2.1 酶 Terminox(EC1.11.1.6),50L以上,由AQUITEX- Maia提供,葡萄牙产。 2.2 过氧化氢酶的固定化 取Al2O3颗粒或薄片(Aldrich),直径分别为3和7毫米,在45摄氏度下,先经浓度4%的γ-氨丙基三乙氧基硅烷(Sigma)烷基化,再放入丙酮中浸泡24小时。用蒸馏水洗涤硅烷化载体后,放入浓度为2%戊二醛水溶液中室温下浸泡2小时(Aldrich),重复清洗一次并在60?C下干燥1小时。取五克的烷基化载体,室温24?C下浸泡在25毫升粗酶制剂中(Costa et al. 2001)。得出,每克Al2O3

英语美文欣赏带翻译

Friends or 'Enemies?' When I was younger, my Dad used to tell me: "Boys don't want to be your friend." He then left the rest to my imagination. At the time, I didn't agree. I thought: I can crack a good joke, I know how to shoot a hoop, and I'm a cheerful person (but not in an annoying way). What kind of boy wouldn't want to be around that kind of girl? Turns out, my Dad was right. Not to be all "Samantha Brick" about it, but in my experience, single, heterosexual men aren't actively looking for an exclusively platonic relationship with a woman they find sexually attractive. This of course is not a revolutionary concept. In fact, it seems pretty natural to me. Now, I will be the first to say that it is really and truly the most wonderful thing in the world if the attraction is mutual. But the Powers That Be seem to like to play these complicated little mating games with humans where the guy we want to re-enact scenes from 9? Weeks with sees our attractiveness level as akin to that of a discarded dishcloth, and the most physical we could see ourselves being with the guy who actually likes us is a game of ping pong over an especially long table. All of which means that someone usually ends up getting rejected. I'm sure I'm not alone when I say I have struggled with the scenario where I am not interested in a man romantically, but I want to keep him as a friend because he is funny and I enjoy his company, or he has shown himself to be that rare specimen known as "a nice, genuine person, " or he simply doesn't mention his therapist in every other sentence. Rather than string him along and give him hope, I feel compelled to somehow communicate to him sooner rather than later that we'll just be staying friends, nothing more. Otherwise, I think I am being unfair to him. Why should he waste his romantic stamina on me when there are loads of other single women out there who might fall instantly in love with him? The thing is, it can sometimes be tricky to reject a man and keep him as a friend. If the operation is not executed carefully, you may end up creating a "menemy." It requires a certain amount of skill to be able to turn down a man's sexual advances or romantic gestures and then get him to agree to meet you for blueberry pancakes the following weekend and chat about the latest Woody Allen film. Some men aren't satisfied with just that. I'm not clear why. What's so bad about friendship? Everyone needs buddies. But I've seen men react poorly or simply fall off the face of the earth. I get it -- their feelings are hurt. None of us likes getting rejected. But in my experience, some men find it especially soul-crushing. I am only bringing all of this up because I recently had to go through this scenario again. I had spent some time cultivating a friendship with a man who, in my defense, I thought was gay. So I didn't see the harm in him buying me the occasional falafel, or accepting an invitation to see a film with him. Isn't that what friends are for? But a mutual friend shed light on his sexual orientation (straight) and suggested that his intentions -- and attentions -- weren't platonic. He had never "made the moves" but now it was all crystal clear -- that explains the way he had looked at me that time the tahini sauce dribbled down my chin! Since he had clearly been too timid to express his feelings, I thought I would be clever this time and subtly mention the dates I had been going on, focusing on the one guy I was kind of keen on, so that he would know that I was "unavailable" for heavy petting and those sorts of activities, but that I was available for things like roller skating, falafel-eating and shooting the breeze. Doesn't that sound nice? That way, he would known not to try to lean in for a kiss, and I wouldn't have to pull the Stevie Wonder dance and dodge him went he went for it. It was like pre-rejection, yet I was sparing his feelings because he didn't even have to put himself out there! I really thought I was being brilliant. It backfired, of course. Said man ended up sending me an email rant accusing me of being insensitive by talking about other men when he had "feelings for me." As if I am psychic, by the way, just because I am a woman! How was I supposed to know that? I think in his mind we were dating. In my mind, he was my new gay BFF. In the end, I got mad at him for getting mad at me, and now the friendship has ended. And I have created yet another "menemy." Look, I have also tried the direct thing: "I really like you, but only as a friend, " but you can only do that when the guy has made his intentions clear, and in my experience, they either cope okay (though rarely do I feel much enthusiasm for friendship after that), or they really don't cope well. I also tried the thing where you make them think they are rejecting you, but it gets quite confusing and only works if the guy isn't very sharp, and why would I -- or you -- be hanging out with someone not that sharp in the first place? As we all remember, Billy Crystal's character says men and women can't be friends in When Harry Met Sally because the sex stuff gets in the way. I do have single, male, heterosexual friends with whom I have an easy, non-romantic rapport, but I honestly don't know if they would walk away if I was sprawled naked on a bed calling out to them. I may not be everybody's cup of tea, but sometimes, I wonder if they wonder. And they may wonder if I wonder. If so, I hope they'll keep it to

英语短文中英文翻译

my friend and I are taking a , we are seeing a boy sit on the chair,he is crying,we go and ask him.“what’s the matter with you” he tell us“I can’t find my dog can you help me”.“yes,I can”.And we help him find his dong .oh it stay under the big tree! 今天我和我的朋友一起去散步。突然我们看见一个男孩坐在椅子上,他哭的很伤心。我们走过去问他:“你怎么了”。他告诉我们:“我的狗不见了,你们能帮我找到它吗”。“是的,我们能帮你找到你的狗”然后我们帮助他找到了他的狗,原来是它呆在一棵大树下。 day an old man siselling a big young man comes to the elephant and begins to look at it old man goes up to him and says inhis ear,“Don't sa y anything about the elephant before I sell it,then i'll give you some money.”“All right,”says the young the old man slles the elephant,he gives the young man some money and says,“Now,can you tell me how you find the bad ears of theelephant?”“I don't find the bad ears,”says the young man.“Then why do you look at the elephant slowly?”asks the old young man answers,“Because I never see an elephant before,and I want to know what it looks like.” 一天,一个老的男人正在卖一头大象。一个年轻的男人走向大象然后开始慢慢看着它(大象),这个老的男人走向他对着他的耳朵说,“不要在我卖出它(大象)之前说关于它(大象)的事,然后我会给你一些钱。”“好的”,这个年轻的男人说。在这个老的男人卖出大象后,他给了年轻的男人一些钱并且说,“现在,你可以告诉我你是怎样知道大象的坏的耳朵了吧?”“我不知道坏的耳朵”,这个年轻的男人说。“然后为什么你慢慢的看着大象?”这个老的男人问。这个年轻的男人回答,“因为我在这之前从来没有见过大象,还有我想知道它(大象)是什么样子的。” 3.An old woman had a cat. The cat was very old; she could not run quickly, and she could not bite, because she was so old. One day the old cat saw a mouse; she jumped and caught the mouse. But she could not bite it; so the mouse got out of her mouth and ran away, because the cat could not bite it.? Then the old woman became very angry because the cat had not killed the mouse. She began to hit the cat. The cat said, "Do not hit your old servant. I have worked for you for many years, and I would work for you still, but I am too old. Do not be unkind to the old, but remember what good work the old did when they were young."? 一位老妇有只猫,这只猫很老,它跑不快了,也咬不了东西,因为它年纪太大了。一天,老猫发现一只老鼠,它跳过去抓这只老鼠,然而,它咬不住这只老鼠。因此,老鼠从它的嘴边溜掉了,因为老猫咬不了它。? 于是,老妇很生气,因为老猫没有把老鼠咬死。她开始打这只猫,猫说:“不要打你的老仆人,我已经为你服务了很多年,而且还愿意为你效劳,但是,我实在太老了,对年纪大的不

英文文献及中文翻译

毕业设计说明书 英文文献及中文翻译 学院:专 2011年6月 电子与计算机科学技术软件工程

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英文PDF文件怎么可以翻译成中文

大家都知道PDF文件比较特殊,想要修改都得花一些心思,要翻译PDF文件岂不是比登天还难?其实不是这样的,工欲善其事必先利其器,找到一个合适的翻译工具还是蛮重要的,下面介绍一个翻译PDF文件的方法,或许对你有帮助哦! 下面是借助文档翻译器翻译PDF文档的方法: 具体怎么操作一起来看: 1:打开文档翻译器,选择功能栏中的文档翻译,之后添加需要翻译的文档,点击【点击上传文档】的按钮,就可以选择了。当然也可以把文件直接拖进去。 2:文件上传之后可以选择翻译的语言哦,根据自己上传的文件的语言来选择原语言,需要翻译成哪种语言直接选择即可。

3:确定好文件以及翻译语言之后,点击【翻译】按钮,软件就可以开始对文件进行翻译啦。 4:翻译成功后,翻译结果后会在右边显示出来,自己可以进行查看,如果需要将文件保存出来,点击【导出文件】的按钮,就可以选择保存的位置啦。

还可以利用在线工具进行翻译 1:这是一个在线的网站,PDF翻译功能在文档处理中,打开网站找到文档处理中的PDF在线翻译,进行点击即可。 2:同样需要添加要翻译的文件,点击【点击选择文件】的按钮。

3:文件添加好之后选择翻译的语言,自定义转换设置中进行选择就好了。最后就可以开始翻译啦,点击【开始翻译】按钮就大功告成啦。 如果你要翻译的文件比较小,可以用下面的这个方法哦; 1:在百度翻译工具中选择你需要的语言,有源语言和目标语音可以选择。

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英语文章及翻译

精心整理 Whatsportsandotheractivitiesdoyouparticipatein?Whatkindsoffoodsdoyoueat?Whatkindofpe opledoyouspendtimewith?Youranswerstotheseandsimilarquestionsreflectyourtotalhealth.He alth is acombinationofphysical,mental/emotional,andsocialwell-being.Thesepartsofyourhea lthworktogethertobuildgoodoverallhealth. 你参加过什么体育活动和其他活动吗?你吃什么食物?你和什么样的人在一起?你对这些问题或者类似的问题的回答反映出了你整体的健康状况。健康是身体、心里和社会安宁感的集合。这些健康的部分结合起来搭建了一个完整的健康体系。 通常,觉更好, t 身体须要远离有害的物质像烟草、酒精和其他毒品。他们用体育运动的时间去平衡他们看电视或玩电脑游戏的时间。体育运动包括做特殊的运动,远足,健身操,游泳,跳舞和做一份工作。通过远离有害物质和坚持体育运动,你可以保持身体健康。另外一种说法就是,要想身体健康就要多运动。 Doyoufeelgoodaboutwhoyouare?Doyouknowhowtohandlestressfulsituations?Doyouhaveapositiv eattitudeaboutlife?Youranswerstothesequestionswilltellyousomethingaboutyourmental/emo tionalhealth.Mental/emotionalhealthismeasuredbythewayyouthinkandexpressyourfeelings.Y oucandevelopgoodmental/emotionalhealthbylearningtothinkpositivelyandtoexpressyourfeel ingsinhealthyways.Positivethinkingisagoodstrategytousewhenyouarefeelingsadordown.Tryf ocusingyourattentiononallofthegoodthingsinyourlife,suchasyourfriends,family,andactivi tiesyouenjoy.Thenthecauseofyoursadnessmightnotseemsobad.Likewise,recognizingandbuildi

英语小短文(带翻译)

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