Every piece of plastic ever made still exists somewhere - that's not just a fact, it's our responsibility.

Simplicity is the ultimate sophistication.

与其杀死毒龙，不如避开毒龙。

1967年10月8日切腿部不幸中弹，包扎伤口时被捕，切平静的说。

教师个人的范例，对于青年人的心灵，是任何东西都不可能代替的最有用的阳光。

The more you know, the more you grow.

你总能变得更好。