A North American study says gestures like fist-pumping by victorious athletes come naturally.

北美一项研究发现，运动员在获胜后握拳振臂之类的庆祝动作是与生俱来的自然反应。

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An American study played people recordings of actors delivering speeches about climate change.

一个美国研究向人们播放演员在做天气转变演讲的录音。

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One American study found that interruptions take up 2.1 hours of the average knowledge worker's day.

一个美国研究发现，平均下来，一名脑力劳动者每天大约有2.1小时处于分心状态。

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Last year, an American study showed such a link between Parkinson's and pesticides, like those used for killing insects.

VOA: special.2009.04.07

So we started collecting cereals and things like that from various countries, and found in this preliminary study, that it was the case, the American foods were sweeter.

我们从全球各地,收集了一些麦片之类的样本,研究发现,情况确实如此,美国的食品相对要甜一些

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

My major? Basically I study American literature... in English, studying literature from 1865 until now.

我的专业？我主要学习从1865年到现在的美国文学，以英语授课。

和英文专业的朋友 - SpeakingMax英语口语达人

An American study found that Mexican truckers had fewer accidents in the United States than their American counterparts.

ECONOMIST: How half of Mexico ended up without driving tests

An American study has found that migraines are linked to weather conditions.

CNN: Vital Signs health tips

Another American study, this time of women who left work to have children, found that all but 7% of them wanted to return to work.

ECONOMIST: Women in the workforce