As special cases, the perturbation Ritz method and perturbation Galerkin method have been structured for solving two practtca~1 examples.是什么意思_As special cases, the perturbation Ritz method and perturbation Galerkin method have been structured for solving two practtca~1 examples.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句