It has a half-life of approximately three years at which time it stops decaying.

它生命的一半是三年,在三年的时候，它就停止衰亡。

麻省理工公开课 - 固态化学导论课程节选

From the standpoint of your genes, you dying for the life of three brothers is an excellent compromise 50% because the genes replicate by fifty percent more.

从你自身基因的角度看，你为了三个兄弟牺牲自己,是非常好的折中,因为基因复制超过。

耶鲁公开课 - 心理学导论课程节选

Although I enjoyed watching The Simpsons more in this particular moment, in justice, if I were to spend the rest of my life considering the three different video clips shown, I would not want to spend that remainder of my life considering the latter two clips.

虽然此刻我更喜欢看《辛普森一家》,但公平地讲，要是让我用后半生来思索,这三个不同的视频片段的话，我不会愿意用尽我的余生,来思考后两个片段。

耶鲁公开课 - 公正课程节选