Beginning from the ordinary differential equations of separable variables, several ordinary differential equations of how to apply variable substitution to seek solution were generalized.

从可分离变量微分方程出发，介绍了几类如何用变量代换求解的常微分方程。

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The result shows that it is effective for solving ordinary differential equation with variable coefficients.

结果表明，该方法对于求解各类变系数常微分方程是十分有效的。

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The adjoint variable method for design sensitivity analysis of multibody system dynamics based on ordinary differential equations is presented.

基于常微分方程数学模型建立了多体系统动力学设计灵敏度分析的伴随变量方法。

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If the trust uses variable annuities, every penny paid will be taxed as ordinary income.

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