Often researchers restrict study participation to patients who have no ailments besides those being studied.

研究人员通常将参与研究的患者限制在除了被研究对象之外没有其他疾病的患者。

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For example, they must make sure they construct measures that are meaningful for each of the cultural or ethnic minority groups being studied.

例如，他们必须确保他们制定的措施对每一个被研究的文化或少数民族群体都是有意义的。

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The problem was being studied.

那时在研究这个问题。

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The men were not fully told why they were being studied or what tests were being done to them.

VOA: special.2010.07.21

This involves mechanisms that are still being understood, but if you've studied some biology or read about this you've heard about the protein complex called Dicer.

人们仍然不太了解这其中的机制,但如果你学过一些生物学,或者读到过有关内容,你会听说过一种,叫做Dicer的蛋白质复合体

耶鲁公开课 - 生物医学工程探索课程节选

At space agency headquarters, doctors studied his medical condition as the information was being sent back to Earth.

VOA: special.2009.06.24

It was the public health service - let victims die while they were being studied.

NPR: Wright Hurts Obama's Notion of a Post-Racial World

But even apart from cloaking devices, the metamaterial techniques being studied have other applications, including fiberoptics.

FORBES: Duke Researchers Perfect The Original Invisibility Cloak

The solution being studied is to halve the amount of downforce allowed on any car.

ECONOMIST: The formula that drives Formula One