For example, the solution of a differential equation is a function.
例如，这个解决方案的微分方程是一个功能。
A partial differential equation is an equation that involves the partial derivatives of a function.
偏微分方程就是，跟函数各个偏导数有关的方程。
A partial differential equation is an equation that involves the partial derivatives of a function.
偏微分方程就是，跟函数各个偏导数有关的方程。
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