除非定理是美丽的，否则它们毫无价值。

The only meaningful way to study learning is through objective measurement.

There is a close connection between the human soul and the natural world; our emotions are intertwined with the external universe.

色彩是我整日的痴迷、快乐和折磨。

煤炭企业的未来在于智能开采和清洁利用。

But not all dark places need light， I have to remember that.

我们不是从祖先那里继承皮革，而是从子孙那里借来的。

One who never turned his back but marched breast forward, never doubted clouds would break.