（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.
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).
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.
利用简单对称性的电磁场，讨论了场和电荷系统遵从的动量守恒、量矩守恒定律。
With a simple symmetrical electromagnetic field, the law of conservation of momentum and the law of conservation of angular momentum for electromagnetic field and charges system are investigated.
由热力学第一定律及无损条件导出了介电张量的对称性；
The symmetry of the permittivity tensor is found to be based on the first law of thermodynamics and the non-wastage condition.
从对称性原理出发，证明了能量守恒定律，并对时间平移对称性与能量守恒作了简单的几何表述。
From the principle of symmetry, law of conservation of energy is proved. And have a simple geometric express for time translation symmetry and conservation of energy.
本文导出的熵变量形式QPNS方程具有对称性和自动满足热力学第二定律，这将提高解的稳定性。
The QPNS equations in entropy variables derived in the present paper have the symmetrization and satisfy the second law of thermodynamics automatically that can improve the stability of the solution.
本文概述了物理学中的对称性及与之相联系的守恒定律。
This paper views the symmetries in Physics and the conservation Laws related to the symmetries.
本文概述了物理学中的对称性及与之相联系的守恒定律。
This paper views the symmetries in Physics and the conservation Laws related to the symmetries.
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