They say exposure at levels common among children in the United States may increase the chances that a child will be diagnosed with A.D.H.D.

VOA: special.2010.05.26

Common objects can be pure or impure; it just depends whether or not they've been in contact with a source of impurity or not. Alright?

普通的事物可以是纯洁的或者不纯洁的;,原因只取决于它们是否,和一些不纯洁的来源有接触，对吧？

耶鲁公开课 - 旧约导论课程节选

These are linguistic terms. But of course, the people who spoke them, especially in the early years, tended to be part of a relatively narrow collection of people, who intermarried with each other chiefly, and therefore developed common cultural characteristics.

这时的希腊语主要是一些语意项,不过当然,那些讲希腊语的人,特别是在早期,是一个相对小范围的人群,他们主要在族群内部通婚,由此,发展出相近的文化特征

耶鲁公开课 - 古希腊历史简介课程节选

By supporting nuclear energy, the president may be seeking common ground with Republicans who have called for building as many as one hundred new nuclear power centers.

VOA: special.2010.02.19

It is testimony to what can be achieved by a transatlantic community that acts with a clear sense of common purpose,".

VOA: standard.2009.04.04