If you want to see what this nation is all about, you have to ride the rails. Look outside as you speed through, and you’ll find the true face of America.

想想看，人类愚蠢到会去小心地避免那些可能使他们造成伤害的臭鼬或是狐狸，却不担心狮子对他们安全造成的威胁。

The study of nature is a perpetual joy.

经济的活力在于其持续适应和创新的能力。

The only way to understand another culture is to assume the frame of reference of that culture.

故事可以帮助孩子们理解世界和他们自己。