单词：variational method
variational method的用法和样例：
例句
- The nonlinear differential equations are solved using finite difference method.用有限差分法求解非线性微分方程组。
- Successful use of the variation method depends on our ability to make shrewd choice of the trial function.成功地应用变分法取决于对尝试函数作精明选择的能力。
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