以单质碘为催化剂合成了环戊酮乙二缩酮.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.传统的缩酮化、酯化反应工业上多采用浓硫酸作催化剂.Traditional ketalization and esterification reactions are usually catalyzed by concentrated acid in industr...

Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.努力过，失败过，没关系，屡战屡败，屡败屡战，每一次失败都比上一次更好。The ideas in the show's presentation were good, but failed in execution.那场展览陈述的想法很好，但是没能实现。The driver failed ...

The saddest thing in the world is a little baby nobody wants.世上最让人难受的莫过于小婴儿遭到遗弃。That was the saddest thing I ever saw with them, the old man thought.它们这情景是我看到的最伤心的了, 老人想.It was one of the saddest days in world history wh...

I went into medicine to care for patients, not to waste time bickering over budgets...我行医是为了治病救人，而不是浪费时间为预算问题争论不休。We saw in Chapter 16 how annual cash budgets are produced.在第16章我们了解了年度现金预算是怎样制订的。Computers are gradually o...

Surface bombardments had nowhere been effective.海面舰只炮击也毫无建树.Bombardments of such density will destroy any defensive works built by the enemy.这样大密度的轰炸会摧毁敌人的所有防御工事.The city has been flattened by heavy artillery bombardment...

This is Chekhov's contribution to Russian literature.这是契诃夫对俄罗斯文学的贡献。But we must not think of Chekhov as a leftist, much less a revolutionary.但是我们绝不应把契科夫看成是个左派人物，他更不是革命者。Research on Chekhovian composing thoughts is a...

经过一连串充满敌意的争吵，交易泡汤了。The deal ended after a series of rancorous disputes.赛季过半时，双方之间的敌意已经公开化了。By mid-season the hostility between the two was undisguised.尽管自己心存敌意，她还是为他所吸引。In spite of her hostility, she was attracted to him...

The catcher spat onto Robinson's shoes , and the pitcher eyed him hatefully.捕手朝他的球鞋吐痰, 投手则用憎恶的眼光瞪着他.'Robinson Crusoe' is one of the most famous books in the world.《鲁宾逊漂流记》是一本世界名著。...a series of lectures by...

Johnson's smashing victory in 1964 changed the political horizon substantially.1964年约翰逊的大获成功给政界带来了翻天覆地的变化。Jake has raised two smashing kids and I trust his judgement.杰克养大了两个了不起的孩子，我相信他的判断。She took revenge on her ex-...

It has performed reliably when used at very high retentions in full - cell impregnation processes.当用满细胞法使它具有很高的保持量时,它的使用是很可靠的.Structure and performance of aluminum impregnation to steel _ container are studied.研究了渗铝包子桶的组...

Now, use your pocketknife to touch the mica and see what will happen.现在你用小刀去触及岩石中的云母,看看会产生什么现象.It could not pass through material impervious to water such as mica.它不能通过云母这样的不透水的物质.To this class of substance belong mica, ...

The dollar's recent strength is crimping overseas sales and profits.美元最近的坚挺影响了国外的销量和利润。Therein, crimping head components comprise crimping box, crimping rollers and crimping block.其中卷曲头组件主要由卷曲箱 、 卷曲辊、卷曲座等部件组成.This m...

Infectious diseases are spreading among many of the flood victims.传染病正在遭受洪灾的很多灾民中蔓延。This study is described under "General Diseases of the Eye"“普通眼科疾病”这一部分里对该项研究作了描述。Frogs eat pests which destroy crops and carry diseases...

Cheerio! I'll see you later.再见！回头见。Cheerio. Say good - bye to the rest of the family for me, will you?再见. 请代我向你家人道别.Cheerio, I'll see you tomorrow.再会, 明天见....

说的时候要注意,避免发错音.Take care in your speaking to guard against mispronunciation....

The Wall Street Journal uses 220,000 metric tons of newsprint each year.《华尔街日报》每年用去22万公吨新闻纸。They get their hands covered in newsprint.他们手上满是油墨。Acres of newsprint have been devoted to the issue.报纸大肆报道了这一问题....

Objective To study the changes of plasma bilirubin level in asphyxial neonates.目的探讨窒息新生儿血浆胆红素水平的变化.Objective To investigate the microcirculation change in asphyxial neonates and to analyze the clinical significance.目的了解新...

What is required to achieve or maintain such viability?要达到或维持这种生存能力需要什么？Scientists are experimenting to find ways to ensure the viability of seeds for even longer periods of time.正如我们所说，科学家正在试验努力寻找让种子的生命力更加延长的方法。...a man...

You think you could run this through IBIS?可以从综合弹道信息系统里查到 吗 ?Eudocimus ruber [ scarlet ibis ]美洲 红?Sir, I have an IBIS hit on six.长官, 六号台姓名核查信息有问题....

The titer of antiserum was detected by immunoelectrophoresis and double immunodiffusion.利用免疫电泳、向琼脂扩散试验分析和测定抗血清的效价.We will conduct double agar diffusion and counter immunoelectrophoresis with aluminium potassium sulfate a...

他们开始了一段经济紧缩的过程.They began a process of economic deflation.这个较紧缩的频率范围不适用于烃类.With this restricted frequency range it is not applicable to hydrocarbons.通货紧缩的意思是物价普遍下降, 通常随之而来的是利润降低,就业机会减少.Deflation means falling prices, usu...

He was elected to power on the strength of his charisma.他凭借其个人魅力而当选掌权。Its oscillation depends on the strength of the gravitational field.它的振动幅度取决于引力场的强度。I bought the car on the strength of her advice.我听了她的劝告才买下这辆汽车....

反渗透主要应用于生活用含盐水的脱盐.Principal application of reverse osmosis has been in desalting brackish waters for domestic consumption.环境工程师应用反渗透原理的机会并不多.The environmental engineer does not have much opportunity to apply the principl...

She had no wish to share her father with any outsider and regarded us as interlopers.她不愿与任何外人分享父亲的爱,并把我们视为闯入者。Security guards were stationed at the door to deal with any interlopers.门口已设警卫人员以阻止闯入的人.And found that the int...

Some people may be tempted to give untruthful answers.有些人也许会不由得想要作出不实回答。I was never tempted for a moment to give her away.我从未想到过要揭她的底儿。She'd never even felt tempted to return.她甚至从未动过回来的念头。Both of which tempted me aw...

Don't fritter away your precious time.大好时光,不可等闲度过.It's easy to fritter away a fortune if you're not careful.如果你不小心,要挥霍掉一大笔钱是很容易的.Don't fritter away your money on things you do not really need.不要把钱浪费在你...

Both lungs will have innumerable metastatic foci and lymphangitic involvement.双侧肺内出现无数的转移病灶和淋巴管性播散.The silica induces a fibrogenic response by macrophages to produce the nodular foci of collagen deposition.巨噬细胞吞噬二氧化硅诱发纤维...

他把烤肉架移到了距离火盆更高的托架上.He replaced the utensil in a higher set of brackets.冬天来临时, 人们喜欢围在火盆旁边取暖.Winter comes, people like around next to the brazier for heating.她还在北京残奥会的取火仪式上捧起火盆.She also makes a fire at the ceremony at Beij...

Only dielectric stratified media will be treated in this section.这一节将只讨论介质分层媒质.In general, all free - surface liquid motions are stratified flows.从这个意义上来说, 一切自由表面液体运动也都是分层流.Two features of folds in stratified rocks that ...

However, they lack ASIC - level performance because of their generalized architectures.然而, 由于它们采用归一化的体系结构,故缺乏ASIC档次的性能.Hands - on experience in ASIC design and system modeling.有ASIC设计和系统建模的经验.RCT Receiver ASIC is the cor...