化学势，从基本方程上说，就是A对N的偏导，因此对A取N偏导，因此化学势也能，用正则配分函数表示。
The chemical potential from the fundamental equation up here is the derivative of a with respect to the number of particles.
这就是基本方程，其中导热系数为温度的函数。
This is the governing equation, where the thermal conductivity is a function of temperature.
给出的挠度函数满足薄板的基本微分方程、全部边界条件以及角点条件。
The deflection functions given satisfy the differential equation of thin plate, all the boundary conditions as well as the conditions at free corner points.
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