Tests aren't just a way for teachers to torture their students, according to a new study that finds the brain encodes better mental hints during test-taking than during studying alone.

考试不仅仅是老师用来折磨学生的手段，因为最新研究表明，考试时大脑消化吸收学习材料的效果要比只是学习看书时产生的效果好一些。

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Over five hundred men and eight hundred women were observed for eighteen years in this long-term study, all of whom took tests at different times to gauge how quick their thinking was.

长期研究表明有五百多男人和八百多女人为肥胖困扰十八年之久。 他们在不同的时间测试他们的思维速度。

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Thus, valuable references were provided for carrying out the study of the balance ability of old people, for studying ways to test their balance ability and for the applicators to use in their tests.

为进行老年人平衡能力的研究，以及老年平衡能力检测方法的研究和测试老年平衡的应用者提供有价值的参考。

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The animals are brought into captivity for medical tests once a year, which allowed the marine biologists to record and study their calls.

BBC: Study finds dolphins mimic calls of social group