Though at that time I didn't realize it was going to last 16 years or longer.

我还不知道它能用,16年以上。

耶鲁公开课 - 死亡课程节选

Not only is it inevitable that you're going to die; not only do some people live longer than others, you don't know how much more time you've got.

你会死去这不仅是不可避免;,不仅有些人活得比另一些人久，你也不知道自己还剩下多少时间。

耶鲁公开课 - 死亡课程节选