yield 四级GMAT考研

The synthesis of ethyl vanillin from urotropin is a major method with high yields,simple process, and available raw materials.

乌洛托品法是合成已基香兰素的一种重要方法，它操作简单，原料易得，产较。

I will not yield a step.

我寸步不让。

That tree yields fruits.

这种树结果。

This land yields well.

这块土地产量。

I yielded the point.

在这个问题上我停止了争论。

The country has sold out its principles in yielding to the demands of a military power.

这个国家屈从于一个军事大国的要求而出卖原则。

The long cruel winter came to an end at last, yielding to a gentle warm spring.

漫长的严冬终于结束, 随之而来的是温暖的春天。

An improved synthetic route of nicomol was introduced in the thesis.The process was simplified via a one-pot procedure and the total yield was 59%.

介绍了合成治疗脂血症的烟酸类药物尼可莫尔的合成路线,本路线采用了一勺烩的方法,简化了操作,总为59%。

Woods, or steepy mountain yields.

或山大川所能馈憎。

The brave soldier would as soon die as yield to such an enemy.

那位英勇的军人宁死也不肯屈服于这样的敌人。

The fitting operation primarily used to produce high quality toilet soap,and this important soapmaking technique greatly affected both the yield and quality of the finished products.

整理操作主要是运用于生产质量的香皂，并且该项技术极大地影响着成品的质量和产量。

Conditions for the synthesis of iso-propylidene malonate was improved with a yield of 82.8%,higher than 49% reported previously.

改进丙二酸亚异丙酯的合成条件,使产达到82.8%。

Cu furaldehyde-ethylene diamine Schiff base complex was synthesized with the yield of 63.

合成了一种席夫碱金属络合物——呋喃甲醛乙二胺铜络合物,为63。

Deuterated perlolyrine was synthesizedstarting from deuterated tryptophan via acid-catalyzed ring-closure, aromatisationand hydrolysis, with a yield of 11.

以色氨酸和氘水反应合成的氘标色氨酸为原料，经环化、氧化脱羧及水解等反应合成氘标川芎哚，产为11。

The invention is applied to the catalytic reactions such as aromatic ketone unsymmetrical hydrogen transfer reaction and can achieve very high yield and enantiotropic selectivity.

此发明应用于芳香酮的不对称氢转移反应等的催化反应中，可以得到很的产和对映选择性。

This method resolved the problem of poor yield of DNA from smut teliospore thick wall, and efficiently avoided the false negative result of PCR.

此法解决了腥黑穗菌厚壁冬孢子核酸样品制备效低的难题,有效地避免了PCR检测的假阴性反应。

He will die, ere he will yield.

他宁死不屈。

The result shows that the indirectly measured radical yields for the ozonolysis of ethene may be underestimated by a factor of 2.

这一结果表明以往间接方法可能低估了自由基的产大约2倍。

Fluorescence spectra of 5-sulfosalicyclic acid (SSA) were studied.Using quinine bisulphate as a reference, fluorescence quantum yield of SSA was measured.

2．研究了SSA的荧光光谱，以硫酸奎宁为参比，测量了SSA的荧光量子产。

Concerning the meat yield, the Limousin breed suckler calves demonstrated the highest values and significant differences as regards the rest of the breeds.Their meat also had significantly less fat.

在牛肉产量上，利木赞牛犊牛和其他品种相比有最的价值和很大的不同，它们的肉脂肪含量很少。