可持续性不是一个流行词，而是对后代的承诺。

对智者来说，世界是喜剧；对愚者来说，世界是悲剧。

愚蠢的事物被重复得越多，它就越容易被误认为智慧。

The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.

I'm not afraid of hard work. I grew up in a family where hard work was a way of life.

The land doesn’t belong to us—we borrow it from future generations.

化学作用无法创造或毁灭物质。