The preliminary study, released Friday, found that radiation from cellphones appears to have increased the risks that male rats developed tumors in their brains and hearts.

周五公布的这项初步研究发现，手机辐射似乎增加了雄鼠患上脑部和心脏肿瘤的风险。

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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

Researchers at Northwestern, in a small study using brain imaging, have found preliminary evidence that being in a positive mood aids the creative process in problem solving.

FORBES: Need to Solve a Problem Quickly? Laugh!