The propensity to truck， barter， and exchange one thing for another is common to all men， and to be found in no other race of animals.

你的声音无法回响是因为我。

"Life is tough, my darling, but so are you."

最好的艺术作品是提出问题而不是提供答案。

人们不应该研究这样的问题，应该把它们留给哲学家。