要理解心理学，就要在自然环境中观察行为。

"In the face of overwhelming odds, the human spirit can still triumph."

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

管理是企业的基础，没有管理就没有效率。

我们这个时代的巨大挑战是创建一个既公正又可持续的世界秩序。

可持续林业不是一种选择，而是我们的责任。

You have to believe in yourself when no one else does.

The truth is not always comfortable, but it is necessary.