As a young performer, he had a song and dance act with partners for a while.

VOA: special.2009.03.09

The governing of a distress call is actually an extremely delicate high-wire act for any young organism from an evolutionary point of view.

事实上，发出求救信号,是极其危险的行为,从进化的角度看,对任何一个年轻的生物体。

耶鲁公开课 - 心理学导论课程节选

Brown knew he must act soon or his young men would begin leaving.

VOA: special.2009.06.18