释义：天之险在于高不可升，地之险在于山川丘陵。王公设险以保卫国家，险的功用非常大。

你和我各有一个苹果，如果我们交换苹果的话，我们还是只有一个苹果。但当你和我各有一个想法，我们交换想法的话，我们就都有两个想法了。

Every role is a new journey, a new opportunity to learn something about life and about myself.

感觉就是秘密。

I don't like favors; they oppress and make me fell like a slave. I'd rather do everything for myself, and be perfectly independent.

"Books are the seeds of imagination."

User experience outweighs commercial interests.

Education is the foundation of sustainable forestry practices.

技术将推动能源的下一个时代，但人类的聪明才智始终是其核心。