知识的唯一来源是经验。

最可持续的森林是在保持其生态完整性的同时为人们提供价值的森林。

A building should respond to its context, not ignore it.

The theory of Communism may be summed up in one sentence: Abolish all private property.

烘焙业务既是科学，也是艺术。

数学证明是用逻辑语言写成的诗。