UNESCO's World Heritage list includes over nine hundred natural or cultural places considered to have universal value.

VOA: special.2010.11.03

Now, the most natural thing to suggest would be, well, you get clear on your favorite theory about the value of life, whatever that is.

现在，提出的最自然的事情就是，你弄明白你最喜欢的,有关生命价值的理论，不管是什么。

耶鲁公开课 - 死亡课程节选