Statistical mechanics: branch of physics that combines the principles and procedures of statistics with the laws of both classical mechanics and quantum mechanics.
统计力学：物理学的分支，将统计学的原理和方法与经典力学和量子力学的定律结合起来。
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The application of degeneration Fermi gas model in astrophysics proves that quantumstatistical theory plays a vitally important role in study area of modern physics.