你不必亲自去尿电网，才能学会不这么做。

The secret of happiness is to expand your interests as much as possible and to be as kind as possible to the people and things that interest you.

你对自己了解得越多，你对在别人身上看到的东西就越有耐心。

可持续林业不仅仅是砍伐树木，更是培育文明。