“微分”造句

绝大多数非线性微分方程是不能用解析方法求解的.
The overwhelming majority of nonlinear differential equations are not soluble analytically.

微分相反的运算叫做积分.
The operation that is the inverse of differentiation is called integration.

这称为正规微分方程组.
This is called a normal system of differential equations.

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