NASA said its astronaut candidates had to be between twenty-five and forty years old and in excellent health.

VOA: special.2009.06.10

Excellent. Okay. So, just to be warned, you might fall in love with the subject you do your UROP in.

所以先警告你们，你们可能会爱上,你们UROP所做的。

麻省理工公开课 - 化学原理课程节选

They must be in excellent physical condition.

VOA: special.2010.08.20