The great challenge of our time is to create a world order that is both just and sustainable.
【释义】人穷的时候不能丧失道德的标准,而发达的时候也不能背弃自己做人的原则。
森林的真正价值不能仅用板英尺来衡量。
所有人都有三种生活:公开的、私人的和秘密的。
The most important thing is to retain your identity and not try to be something you're not.