The general physical laws base on the principle of symmetry, so it is regarded as the higher principles.
基于时变力学的对应性原理，建立一种黏弹性时变力学的一般性解法，适用于一类时变力学问题的求解。
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.
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。
In 1955, he became Professor in Princeton University. Although he has carried out many studies in the fields of physics, he concentrated on statistic mechanics and symmetry principle.
1955年成为普林斯顿大学的教授。虽然在物理学的领域中从事许多的研究，但他还是热衷于统计力学与对称原则。
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