在参加此次研究之前，实验对象需要通过“离心忍受度测验”，以保证他们在测试过程中不会呕吐。

Before enrolling in the study, subjects had to pass a "centrifuge-tolerance test" to make sure they wouldn't vomit.

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一项盖洛普民意测验显示，40%美国的调查对象害怕在众人面前说话。

A Gallup Poll survey showed that 40 percent of U.S. respondents fear speaking in front of an audience.

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在一个民意测验中显示，70%的调查对象认为最糟糕的事情还是经济。

In one opinion poll, 70% of respondents said they felt that the worst was yet to come for the economy.

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