（德国数学家） Noether 所发现的是，只要在自然界呈现连续对称性（的地方），守恒定律就一定成立，反之亦然。

What Noether discovered is that whenever nature displays a continuous symmetry, a conservation law comes along for the ride, and vice versa.

youdao

定律也不会因为你观察的方向不同而改变(这是转动对称性，Rotational Symmetry)。

Nor do the laws of nature change depending on the direction in which you look (rotational symmetry).

youdao

还有一个更重要的事情，这些对称性暗示着大量的守恒定律。

An even more important fact is that these symmetries implicate a large number of conservation laws at the particle level.

youdao