Each year, the John F.Kennedy Center for the Performing Arts in Washington honors performers for their lifetime of work.

VOA: special.2009.11.30

Cells can stop in their lifetime at some point in the cell cycle and persist for long periods of time.

细胞生命期可以停止在细胞周期的某个点,并保持很长时间

耶鲁公开课 - 生物医学工程探索课程节选

There was no good reason in the world that an abolitionist in the 1830s, '40s, and even the '50s, had any right to believe they would see the end of slavery in their lifetime.

然而在这世上并不存在一个好理由,使一个十九世纪三十年代,四十年代甚至五十年代的废奴者,几乎不可能相信,他们在有生之年会看到奴隶制的终结

耶鲁公开课 - 美国内战与重建课程节选