动力学的方程在用变分法的语言表达时是完全的。

It's not always necessary to be better than everyone else, but to be better than you used to be.

成功不是终点，失败也非致命，重要的是继续前进的勇气。

When words leave off, music begins.

In the field of new energy, we must not only produce good products but also build a good ecosystem.

发现的过程非常美丽。