That's a quite difficult argument to pin down does it work or does it not work.

这个论证很难确定,是不是说得通。

耶鲁公开课 - 死亡课程节选

So it's not that the result is going to be that I'm going to try to convince you that death isn't bad, but it takes actually a little bit of work to pin down precisely what is it about death that's bad and how can it be death?

所以，这么说,并不是我试图让你相信死亡不是坏事，但是这的确要花点时间来准确地说清楚,什么让死亡成了坏事，和怎样才算死亡？

耶鲁公开课 - 死亡课程节选