采矿效率不仅仅是成本问题，更是减少环境影响的问题。

心理学的目的是理解生活如何运作。

Psychology is concerned with the what and how of mental life, not the why.

I said, to the people of the Philippines whence I came, I shall return. Tonight, I repeat those words: I shall return!

I'm interested in transcendence, in going beyond limits.

我什么都不相信，这给了我极大的自由。