After only one or two trials, many bees learned to stick out their tonguelike proboscis in anticipation of a sugary droplet.

经过短短的一两个试验，许多蜜蜂已经学会在期盼已久的含糖微滴前吐出舌样长鼻。

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In some countries this may not be required as many clinical trials were done with similar annual vaccine preparation, and the assumption is that the new pandemic vaccine will behave similarly.

而在另一些国家，这可能不必要，因为通过每年类似的疫苗制备过程，已经作过许多临床试验，因此假定这种新的大流行性流感疫苗将以同样的方式起作用。

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Because of the varying requirements for trial registration around the world, many multinational, multicentre trials are registered in more than one registry.

由于全球试验注册的要求不同，许多跨国跨中心试验在多个注册中心注册。

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Anti-GM forces in Britain have successfully destroyed many field trials of GM crops.

VOA: standard.2009.10.21

It's a literary genre that dates back to late classical Greece and which typically charts the trials and tribulations of a hero, in many cases the trials and tribulations of a virginal heroine.

它是一种文学流派，可以追溯到古典希腊时期,这种流派规划了一位英雄了考验和磨难，许多情况下是给一位童贞的女英雄的考验和磨难。

耶鲁公开课 - 弥尔顿课程节选

At this point the study had been undertaken, there had been many, many more trials that had been done on cancer in men than there had been done on cancer in women, so there was a political reason for doing it as well.

研究就是基于这一点开始的,但在完成了的癌症实验中,关于男性的实验,要远多于关于女性的,这样做也是有政治因素的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

As a result, it will be harder to obtain convictions in the many trials that are still to come.

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If that is true in people, too, many more drugs now in clinical trials may prove to be ineffective.

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He says the reason why so many cancer drugs are fizzling in trials is that common tumors contain too many mutations for targeted drugs to work.

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