英语课文翻译
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Ifyouhadtochoosethesinglemostimportantdiscoveryofthe20thcentury,youwouldhavearealdilemmaonyourhands.Injust100years,theworldchangedcompletely.Amazingdiscoveriesweremadeinm... If you had to choose the single most important discovery of the 20th century, you would have a real dilemma on your hands. In just 100 years, the world changed completely. Amazing discoveries were made in medicine, communications and transport, not to mention our knowledge of the world and space . Medical advances ranged from discovering the causes of diseased under microscopes to surgical procedures replacing diseased organs with donated ones.Communications changed with the introduction of mobile phones and the way we correspond went from writing letters to emailing. We started flying around the world and meanwhile, scientists figured out how to spilt the atom, previously thought to be the smallest particle of matter in the universe. Although it is impossible to choose the most important discovery, it is possible to single out a few pioneers of the 20th century.Here are five of them. 展开
全部评论(6条)
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- 2011gao1234 2012-02-03 00:00:00
- 如果你有选择的 20 世纪的单一Z重要发现,你将你手上有真正的困境。只是 100 多年来,世界完全改变了。令人惊异的发现在医学、 通讯和交通工具,更不用说我们的地球和宇宙的知识宗。医学的进步,从发现到替换与患病器官的外科手术显微镜下病的原因不等捐赠的。 通信改变的移动电话和我们所对应的方式介绍了从写信来发送电子邮件。我们开始在世界各地的飞行和与此同时,科学家们想出如何把泼了原子,过去认为是宇宙中物质的Z小粒子。虽然不可能选择的Z重要的发现,有可能挑出 20 世纪的先行者。这里有他们其中的5个。
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- 撒旦发射地方6 2012-02-03 00:00:00
- 如果你选择了Z重要的发现的第二十个世纪,你会有一种真正的困境,在你的手中。在短短的100年,世界完全改变了。惊人的发现是在医药,通讯和交通工具,更不用说我们认识世界和空间。医学的进步,从发现的原因,患病的手术显微镜下的替换患病器官捐赠的。通讯的手机的普及和我们的方式对应从写信给发送电子邮件。我们开始飞行环游世界,与此同时,科学家们想出了如何分裂原子,以前被认为是Z小的粒子的物质在宇宙中。虽然这是无法选择Z重要的发现,这可能是挑选出一些先锋第二十世纪。这是其中的五个。 希望你的成绩步步高升!^_^
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- 竹苞钰子 2012-02-03 00:00:00
- 在20世纪Z重要的发现就是你不得不选择单身。也许在你手头上真的有困境。在100年里,世界完全的改变了。Z令人惊异的发现就是制造机器,交通运输,更不必说我们的知识和发展的空间。先进的YL从用显微镜发现疾病的原因变化到用外科手术将疾病的器官替换成捐赠的器官。交流方式引进了移动电话和相应的我们由写信变成用电子邮件。我们开始坐飞机环游世界,与此同时科学家算出如何分割原子。以前它是宇宙中被认为Z小颗粒的物体,尽管我们不可能去发现Z大的物体,但是它可能是20世纪的先锋,是五个中的一个。
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- 波波a123 2012-02-03 00:00:00
- 如果你有选择的20世纪Z重要的一个发现,你会在你的手中有一个真正的困境。在短短的100多年中,世界完全改变。在医药,通讯和运输作了惊人的发现,更何况我们的世界和空间的知识。医学进步为更换手机的推出,我们的对应方式改变捐赠ones.Communications患病器官的手术显微镜下发现病变的原因,从去写收发邮件信件。我们开始在世界各地飞行的同时,科学家们想出了如何溢出原子的,以前被认为是Z小的物质在宇宙中的粒子。虽然这是不可能的选择Z重要的发现,是有可能,至挑出20 century.Here的几个先驱,是他们五个。
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- 阿布丶丶阿布 2012-02-03 00:00:00
- 如果你选择了Z重要的发现的第二十个世纪,你会有一种真正的困境,在你的手中。在短短的100年,世界完全改变了。惊人的发现是在医药,通讯和交通工具,更不用说我们认识世界和空间。医学的进步,从发现的原因,患病的手术显微镜下的替换患病器官捐赠的。通讯的手机的普及和我们的方式对应从写信给发送电子邮件。我们开始飞行环游世界,与此同时,科学家们想出了如何分裂原子,以前被认为是Z小的粒子的物质在宇宙中。虽然这是无法选择Z重要的发现,这可能是挑选出一些先锋第二十世纪。这是其中的五个。
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- 卢英财 2012-02-03 00:00:00
- 如果你只能选择一项20世纪里Z重要的发现,那么你会发现真的是难以取舍。就在短短的100年里,世界的改变可谓翻天覆地。在医药、通讯和交通上有各种令人惊叹的发现,更不用说我们对于世界和宇宙的了解了。 医学方面,有了从在显微镜下找到疾病的原因,到将患病的器官移植为捐献器官的进步。 通讯方面的改变则有了移动电话的普及,通信方式也从写信发展成为写电子邮件。 我们开始乘坐飞机环游世界,同时科学家们也找出了分割原子——那些从前被认为是宇宙中Z小的粒子——的方法。 虽然说无法选出Z重要的发现,但是我们可以在20世纪的发现中找到一些Z有代表性的事物。 下面将介绍其中的五个。
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热门问答
- 英语课文翻译
- Ifyouhadtochoosethesinglemostimportantdiscoveryofthe20thcentury,youwouldhavearealdilemmaonyourhands.Injust100years,theworldchangedcompletely.Amazingdiscoveriesweremadeinm... If you had to choose the single most important discovery of the 20th century, you would have a real dilemma on your hands. In just 100 years, the world changed completely. Amazing discoveries were made in medicine, communications and transport, not to mention our knowledge of the world and space . Medical advances ranged from discovering the causes of diseased under microscopes to surgical procedures replacing diseased organs with donated ones.Communications changed with the introduction of mobile phones and the way we correspond went from writing letters to emailing. We started flying around the world and meanwhile, scientists figured out how to spilt the atom, previously thought to be the smallest particle of matter in the universe. Although it is impossible to choose the most important discovery, it is possible to single out a few pioneers of the 20th century.Here are five of them. 展开
- 帮忙翻译一段英语
- Plant material and culture conditions have been described (7). Briefly, a diploid tissue culture line, WOO1C, of wild carrot, Daucus carota L., was maintained in Murashige and Skoog medium supplemented with 0.1 mg of 2,4-dichlorophenoxy... Plant material and culture conditions have been described (7). Briefly, a diploid tissue culture line, WOO1C, of wild carrot, Daucus carota L., was maintained in Murashige and Skoog medium supplemented with 0.1 mg of 2,4-dichlorophenoxyacetic acid (2,4-D). To regenerate plants from the culture, callus tissue was transferred to the same medium devoid of 2,4-D (embryogenic medium). All experiments were performed with cultures grown in liquid medium. For convenience, cultures grown in 2,4-D-containing medium are referred to as "callus cultures", and those grown in medium without 2,4-D as "embryo cultures." The growth of callus cultures was measured by the sidearmturbidity method (7). The number of cells at any time point of growth was estimated from turbidity in a Klett-Summerson calorimeter and was expressed in arbitrary units. For example, Klett 100 corresponds to ="2 X 106 cells per ml. The relationship is linear up to Klett 150 in our Klett-Summerson colorimeter. Suspension cultures ofWOOLC cell line are normally maintained at cell densities between 106 and 107 cells per ml in 0.1 mg of 2,4-D per liter (high-density culture) in shake flasks. During a quantitative study on embryogenesis, we found that maximal embryo production can be achieved by first incubating the culture at high density in medium without 2,4-D for one generation time and then diluting it to 2-3 x 104 cells per ml (low-density culture). To compare cultures of comparable density, callus cultures and embryo cultures were subjected to the same procedure. To initiate low-density embryo or callus cultures, an 8-day-old high-density culture grown at the logarithmic phase was washed three times with fresh callus or embryogenic medium and resuspended at 8 x 105 cells per ml for one generation (3 days) in its corresponding medium. It was then diluted to 2 x 104 cells per ml; 20 ml of the culture was incubated in a plastic Petri dish (9 cm in diameter) at 240C. The morphogenetic events of the cultures were examined and photographed under a dissecting microscope. 请不要用google的那个,我看不懂~~ 展开
- 英语请人工翻译,
- DARPA has been at the forefront of the aggressive FCS initiative. We are conducting demonstrations of advanced prototypes, including unmanned ground reconnaissance and attack platforms; low-cost tactical precision munitions; small UAVs t... DARPA has been at the forefront of the aggressive FCS initiative. We are conducting demonstrations of advanced prototypes, including unmanned ground reconnaissance and attack platforms; low-cost tactical precision munitions; small UAVs that support operations in urban and mountainous environments; and sensors that can detect vehicles camouflaged under dense foliage. A Defense Acquisition Board scheduled for May could allow FCS to enter System Development and Demonstration under Army management this year. This will enable the Army to field an FCS Unit for operational testing in FY 2008, with the first Unit of Action ready for operational deployment by 2010. DARPA is also conducting three unmanned air combatant programs: the Unmanned Combat Air Vehicle (UCAV) with the Air Force, UCAV-N with the Page 5 of 14 Navy, and the Unmanned Combat Armed Rotorcraft program with the Army. These aircraft will be teamed with manned systems on the ground and in the air to transform how the Air Force suppresses enemy air defenses, how the Navy suppresses enemy air defenses and conducts extended surveillance, and how the Army conducts armed reconnaissance and attack. 展开
- 环境英语文献翻译 急用
- Thereisagrowinginterestindeterminingmercury(Hg)levelsinthemarineenvironmentaswellasinfishforhumanconsumption.Methylmercury(MeHg)inparticularisthemosttoxicandbioaccumulati... There is a growing interest in determining mercury(Hg) levels in the marine environment as well as in fish for human consumption. Methyl mercury(Me Hg)in particular is the most toxic and bioaccumulative form of mercury in food webs and it is the predominant chemical form making up 80%-90% of the total mercury present in fish muscle tissue.Hence,fish and other organisms at the end of the food chain constitute the major source of MeHg in the human . As outcome of this risk,MeHg has been classically monitored in fish, and methodologies for mercury speciaion have increased significantly since the early 1990s. Currently, microwave-assisted extraction (MAE) has provided an efficient alternative strategy to conventional techniques for solvent extraction of a large amount of organometals compounds.The analytical techniques most frequently applied for Hg speciation analysis involve GC(GasChromatography) , GC-CICP-MS(Gas Chromatography -CInductively Coupled Plasma Mass Spectrometry) supercritical fluids chromatography (SFC),ion chromatograph(IC), HPLC-CCVAAS(High Performance Liqui Chromatography-Cold Vapor Atomic Absorption Spectrometry) or ICP-MS systems .Several authors recommended a back-extraction of mercury species from organic solvents to cysteine or sodium thiosulphate aqueous solutions .Because MeHg is the most common organomercury compound in biological materials ,here we offer a new simple and cost-effective method to determine MeHg. Basically, this method combines the microwave assisted extraction followed by clean-up with cysteine acetate solution and MeHg quantification by a direct mercury analyzer (DMA). 展开
- 金相组织用英语怎么翻译?
- 它是指金属的内部结构,急!THANKS... 它是指金属的内部结构,急!THANKS 展开
- 英语高手帮忙翻译一下
- ThequalitysystemofthecompanyisinconformitywithISO9002.Makingcomprehensiveuseofbiotechnology,thecompanyspecializesinmanufacturingandsellingC-4seriesorganicacidsandchiralpr... The quality system of the company is in conformity with ISO 9002 . Making comprehensive use ofbiotechnology, the company specializes in manufacturing and selling C-4series organic acids and chiral products. These products are widely used in many fields such as food, phamaceutical and chemical industries, and are well accepted by the overseas markets. The man products are L-Malic acid , DL-Malic acid, L(+)-Tartaric acid , Fumaric acid, Maleic acid and other organic acids. Annual productivity amounts to 20,000 tones. The company has become an important manufacturer of C-4 series organic acids in the world . All the products of the company have respectively met the different international aadvanced standards such as Food chemicals Codex, U.S. Pharmacopoeia ,British Pharmacopoeia and the products have obtained Star-K Kosher certificate. Above 70% of the Companys products are exported to Japan, Europe, Australias, the United states and middle East , and they are renown and well recognized in the international markets. The company will devote itself to research and development of enzyme technology and organic electrochemistry. It will continuously introduce new food additives, chiral pharmaceutical intermediates, chiral auxiliaries and chiral drugs. Depending on superior quality, good service and high reputation, the company is willing to establish a long-term mutually beneficial business partnership with overseas customers and continue contribute to the happy life of humans. 展开
- 单向加速度传感器 英语怎么翻译
- 磁翻板液位计用英语怎么翻译?
- 磁翻板液位计用英语怎么翻译?有没有专业一点的说法?
- 哪位英语高手帮帮忙,翻译英语文章!谢谢1
- 英语高手,谢谢了!ThecatalystsupportwasimpregnatedwithacetonesolutionofRuCl3.nH2Ouptorutheniumcontentof4w%,understirringfor6h.Afterconcentrationinarotaryevaporator,theobt... 英语高手,谢谢了! The catalyst support was impregnated with acetone solution of RuCl3.nH2O up to ruthenium content of 4 w%, under stirring for 6 h. After concentration in a rotary evaporator, the obtained material was dried in air at 383 K overnight and subjected to preliminary reduction with a 1N2/3H2 stream at 698 K, and then cooled in 1N2/3H2 atmosphere. The potassium promoter was introduced by incipient wet impregnation with KNO3 solution at room temperature with molar ratio of K+ /Ru = 5/1. After stirring for 6 h and infusing for 24 h, the samples were dried in a rotary evaporator at 343K and then dried in the air at 383K for 12 h. The ammonia synthesis activities of the catalysts with about 35-60 meshes were evaluated by 1N2/3H2 flow of 2100 mL/h at 0.2 MPa from 623 K to 773 K. The amount of effluent ammonia was determined by titration method. As we can see from the Table 1, under the same reaction conditions, the catalyst K-Ru/Mg(Al)O exhibited the highest activity, 38.42 mL NH3•h-1•g-1 at 673K, 3 times more active than K-Ru/MgO, 12.88 mL NH3•h-1•g-1 at 748K. This means that selection of supports takes great effects on the activity of catalysts. The ammonia synthesis activity of different supports are K-Ru/Mg(Al)O > K-Ru/Mg-Al-Ca(1) > K-Ru/Mg-Al-Ca(2) > K-Ru/Al2O3 > K-Ru/CaO > K-Ru/MgO. The combinatorial supports showed higher activity than single supports. However, the sequence of temperature corresponding to the highest activity is just opposite to that of the activity. The optimal temperature for K-Ru/Mg(Al)O, 673K, is the lowest of all, on the contrary, that of K-Ru/MgO is the highest, 748K. The Mg(Al)O has a larger surface area of 140.95 m2•g-1 , similar to γ-Al2O3, 110-180 m2•g-1 . The other two combinational supports have little surface areas but higher activities than Al2O3. It suggested that the activity of the catalyst is influenced not only by the dispersion of Ru crystals but also by the crystal structure of the supports. Table 1 Ammonia synthesis activities and BET surface areas Catalyst Optimal activity Highest activity Surface area of support temperature(K) (NH3/mL•h-1•g-1) (m2•g-1) K-Ru/MgO 748 12.88 K-Ru/Al2O3 698 23.79 K-Ru/CaO 723 23.22 K-Ru/Mg(Al)O 673 38.42 140.95 K-Ru/Mg-Al-Ca(1) 698 30.75 29.10 K-Ru/Mg-Al-Ca(2) 698 26.12 14.69 Acknowledgments This work was supported by the NNSF of China (20273053, 20023001 and 29933040), the 973 Programming (001CB108906) and the NSF of Fujian province (E0310001). References 1. C. J. H. Jacobsen, S. Dahl, P. L. Hansen et al., J. Mol. Catal. A, 2000, 163, 19. 2. F. Cavani, F. Trifiro, A. Vaccari, Catal. Today, 1991, 11, 173. 展开
- 电子,通信类专业英语求人工翻译,软件翻译的别来。
- 如题ThetermASICisoftenappliedtofull-customandsemi-customintegratedcircuits.Anotherclassofintegratedcircuitisthatofprogrammablelogic.Theearliestprogrammablelogicdevices(PL... 如题 The term ASIC is often applied to full-custom and semi-custom integrated circuits.Another class of integrated circuit is that of programmable logic.The earliest programmable logic devices(PLDs) were programmable logic arrays(PLAs).Like gate arrays,these consist of arrays of uncomitted logic,but unlike mask-programmable gate arrays,the configuration of the array is determined by applying a large(usually negative) voltage to individual connections. 展开
- 帮忙翻译一哈文章(翻译成英语)
- 摘 要 本文采用环氧氯丙烷、乙二胺、对氨基苯磺酸等物质合成了一种新的活性染料耐氯水牢度提升剂,并对经多种类型活性染料染色的织物进行固色处理,再进行氯漂处理。经过对织物K/S值、Z大吸收波长λmax、摩擦牢度及皂洗牢度的分析,确定提升剂处理的Z佳工... 摘 要 本文采用环氧氯丙烷、乙二胺、对氨基苯磺酸等物质合成了一种新的活性染料耐氯水牢度提升剂,并对经多种类型活性染料染色的织物进行固色处理,再进行氯漂处理。经过对织物K/S值、Z大吸收波长λmax、摩擦牢度及皂洗牢度的分析,确定提升剂处理的Z佳工艺。实验表明:织物的K/S值有很大的提高,织物的耐氯牢度大致可提升2~3级,并且不会改变织物色光。但是提升剂对色织物的摩擦牢度和皂洗牢度影响不是很大。 关键词:活性染料;耐氯色牢度;提升剂;染色工艺 展开
- 一个英语句子的翻译---在线等
- it is no good crying over spilt milk. 覆水难收 请直译这个句子。谢谢
- 哪位英语高手帮我翻译几个地名?
- 以下几个地名和句子:(是可书面应用的,不要口语,如是口语请注明) 1. 潘家园旧货市场 2. 长安大戏院 3. 西单图书大厦 4. 京广ZX 5. 什刹海 6. 秀水 7. 建国门地铁站 8. 百年奥运,梦想成真。
- CAN现场总线的英语文献和翻译
- 朋友,你可以把你以前的can现场总线的英语论文和翻译发给我吗?60388153@qq.com... 朋友,你可以把你以前的can现场总线的英语论文和翻译发给我吗?60388153@qq.com 展开
- 英语高手帮忙翻译段英文 谢谢!!
- In this paper, the degradation of an azo dye Orange G (OG) on nitrogen-doped TiO2 photocatalysts has been investigated under visible light and sunlight irradiation. Under visible light irradiation, the doped TiO2 nanocatalysts demonstrated ... In this paper, the degradation of an azo dye Orange G (OG) on nitrogen-doped TiO2 photocatalysts has been investigated under visible light and sunlight irradiation. Under visible light irradiation, the doped TiO2 nanocatalysts demonstrated higher activity than the commercial Dugussa P25 TiO2, allowing more efficient utilization of solar light, while under sunlight, P25 showed higher photocatalytic activity. According to the X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV–vis spectra analyses, it was found that both the nanosized anatase structure and the appearance of new absorption band in the visible region caused by nitrogen doping were responsible for the significant enhancement of OG degradation under visible light. In addition, the photosensitized oxidation mechanism originated from OG itself was also considered contributing to the higher visible-light-induced degradation efficiency. The effect of the initial pH of the solution and the dosage of hydrogen peroxide under different light sources was also investigated. Under visible light and sunlight, the optimal solution pH was both 2.0, while the optimal dosage of H2O2 was 5.0 and 15.0 mmol/l, respectively. Azodyes, which are characterized by the presence of one or more azo bonds ( N N ), are among the most notorious widespread environmental pollutants associated with textile,cosmetic, food colorants, printing, and pharmaceutical indus-tries. Because of their non-degradability, toxicity, potential mutagenicity and carcinogenicity, wastewaters originating from these dyes production or application industries pose a major threat to the surrounding ecosystems and human beings’ health.[1–3].Environmental concerns and the need of meeting the strin-gent international standards for rejecting wastewaters has made the development of novel and cost-effective processes for the purification of azo dyes effluents an issue of major technological importance. 展开
- 帮忙翻译下化工的英语。。用在线词典翻译部正确
- A reversed-phase ion-pairing high-performance liquid chromatography (RP-HPIPC) method for the separation of a complex mixture of heparin-derived oligosacchrides has been developed by a stepwise optimization of the mobile phase, in which the... A reversed-phase ion-pairing high-performance liquid chromatography (RP-HPIPC) method for the separation of a complex mixture of heparin-derived oligosacchrides has been developed by a stepwise optimization of the mobile phase, in which the concentration of ion-pairing reagent, mobile phase pH, and acetonitrile concentration were varied. The resolution of more than 30 oligosaccharide components was obtained, under optimized conditions, in an analysis time of less than 30 min. This represents the first RP-HPLC method that can separate a complex mixture of both small and large sulfated oligosaccharides in a single chromatographic step. The heparin-derived oligosaccharides, in this mixture, can also be separated under a second set of RP-HPIPC conditions using a volatile ion-pairing reagent, tributylammonium acetate, to aid in the recovery of individual sulfated oligosaccharides. Moreover, it was possible to replace sodium chloride gradient, required for eluting highly sulfated oligosaccharides, with a fixed, low concentration of a volatile salt, ammonium acetate, by utilizing an acetonitrile gradient. This solvent system might make it possible to directly interface this RP-HPIPC separation with mass spectral analysis. 2003 Elsevier B.V. All rights reserved. Keywords: Ion-pairing reagents; Gradient elution; Oligosaccharides 展开
- 谁可以帮我翻译下这段话成英语,急用,求英语高手
- 本文简述了国内外有关大气生物气溶胶的研究现状及其展望。主要围绕生物气溶胶的研究意义,生物气溶胶的研究历史,生物气溶胶的种类及来源,生物气溶胶的浓度及粒径分布特征,生物气溶胶采样技术与检测,以及对生物气溶胶未来发展的展望等六个方面进行了阐述。... 本文简述了国内外有关大气生物气溶胶的研究现状及其展望。主要围绕生物气溶胶的研究意义,生物气溶胶的研究历史,生物气溶胶的种类及来源,生物气溶胶的浓度及粒径分布特征,生物气溶胶采样技术与检测,以及对生物气溶胶未来发展的展望等六个方面进行了阐述。ZD介绍生物气溶胶的分布特征。 展开
- 请问各位英语高手,对开多叶调节阀英语怎么翻译啊?
- 原因是:我还太年轻用英语怎么翻译
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