选自汉·桓宽《盐铁论·力耕》。道：放大。治理百姓的方法，在于节约用度，注重农桑。

The Langlands program is a framework for exploring the unity of mathematical thought.

"What's terrible is to pretend that the second-rate is first-rate. To pretend that you don't need love when you do; or you like your work when you know quite well you're capable of better."

释义：人才没有固定不变的价值，器物没有一成不变的用处。

物理定律必须以独立于坐标系选择的方式表述。