经济与生态之间的平衡是现代林业的核心。

"In human relationships, kindness and lies are worth a thousand truths."

没有事情是不可能的，“不可能”这个词本身就含有“不，可能”。

Our frustration is greater when we have much and want more than when we have nothing and want some. We are less dissatisfied when we lack many things than when we seem to lack but one thing.

地质学研究的真正魅力在于从已知到未知的思维锻炼。

我不是因为快乐而唱歌，我因为唱歌而快乐。