It's not the most interesting physical object in the world, but it's a whole lot more interesting than a piece of chalk.

它虽不是这个世界上最吸引人的物理对象,但它能干的事比一根粉笔能干的有趣多了

耶鲁公开课 - 死亡课程节选

A piece of chalk can be broken.

一根粉笔可以被破坏。

耶鲁公开课 - 死亡课程节选

Here's a piece of chalk.

这有一根粉笔。

耶鲁公开课 - 死亡课程节选