There is no man, however wise, who has not at some period of his youth said things, or lived in a way the consciousness of which is so unpleasant to him in later life that he would gladly, if he could, expunge it from his memory.

林业领导力需要耐心——就像我们管理的树木一样，真正的影响是随着时间的推移而增长的。

Profit that depletes the planet is no profit at all.

The most comfortable chair is the one I use myself when I have visitors.

大分子的概念并不容易被接受；它需要化学家对物质结构的思考方式发生彻底的改变。