可持续性不仅仅是一个流行词，它是未来森林必须赖以发展的基础。

We don't just extract oil; we extract potential for economic growth and development.

The test of a psychological theory is its applicability to life.

We are all different, but we share the same human spirit. Perhaps it's human nature that we adapt and survive.

My past doesn't define me, it refines me.

The death of a beautiful woman is, unquestionably, the most poetical topic in the world.

The true way is along a rope that is not stretched at any great height but just above the ground. It seems more designed to make people stumble than to be walked upon.

学习数学的最好方法就是去做数学。