每一次成功只是为更困难的问题买了一张入场券。

"The colony is the place where the project of a new humanity is to be tested, where the dream of a world without borders is to be realized, where the dream of a world without races is to be realized."

"The best books are the ones that leave you a little different than when you started."

地理学是研究地方的科学。它的视野宏大，视角全景。