地理带的研究揭示了自然界的统一性，尽管它表面上看起来多样。

Scars have the strange power to remind us that our past is real.

The world is made of words, and if you know the words the world is made of, you can make of it whatever you wish.

可持续发展不是一种选择，而是我们对后代的责任。