It's extremely cruel to perform an experiment on live animals.

对动物活体进行实验是一件极其残忍的事情。

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When the researchers repeated the laboratory experiment on the second and third nights they found the left hemisphere could not be stimulated in the same way during deep sleep.

当研究人员在第二和第三晚重复实验室里的实验时，他们发现在深度睡眠时左脑不能以同样的方式受到刺激。

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In his opinion, if the statement that humans cause global warming is correct, we should act—because we don't have another planet to experiment on.

按他的看法，如果报告中人类导致全球变暖的说法是正确的，我们就应该采取行动——因为我们再没有另一个星球进行试验。

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Henrietta Lacks' husband and children found out about the experiment done on her when scientists contacted them.

VOA: special.2010.07.21

But before I tell you about lab experiments let me tell you about the most famous field experiment on this idea.

但是，在此之前,让我告诉你们关于这个观点最著名的现场试验。

耶鲁公开课 - 心理学导论课程节选

Things that we can relate to the properties of the substance that we're doing the experiment on.

我们实验对象性质,有关的物理量来表示。

麻省理工公开课 - 热力学与动力学课程节选

Over the past several weeks I have used Facebook to undertake an unscientific experiment on branding.

FORBES: Ideas make the mark!

However, he is more impressed with Prof Jennings's experiment on his students in the workplace.

BBC: Technology

Nagle said conservators would need to experiment on reconstructions of the original painting's damaged area.

BBC: Rothko damage 'could take up to 18 months to repair'