A urine test that detects nicotine means no job is offered.

VOA: standard.2010.02.18

And, by all means, if you are scheduled to attend class at 11:00, please take the test at 11:00.

当然，如果你安排到11：00参加考试的话，请在11：00参加考试。

麻省理工公开课 - 固态化学导论课程节选

Prove here means "to test, to try all things."

求证这里的意思是去试验，尝试所有的东西“

耶鲁公开课 - 弥尔顿课程节选