The iteration method is applied to seek the approximate solution of the hybrid system.
用逐次近似法寻求混合系统的近似解。
The approximate solution of infinitely long plane strip is obtained by the method of energy.
用能量法求得了无限长条板的近似解。
Point that we not only find the approximate solution by using the perturbation method, but also can find the precise solution.
认为电场中带电谐振子用定态微扰的方法不仅可以求近似解，也可找到其精确解。
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