地理学是研究地球作为人类家园的科学。

Responsible fishing is not an option; it's an obligation.

理论是灰色的，而生活之树常青。

The thing about smart people is that they seem like crazy people to dumb people.

记忆是个奇怪的东西。它不像我以为的那样运作。它不是可以重播的电影。它更像是一个你讲给自己的故事，而每次讲述这个故事都会改变。