Integrating Factors and Conservation Theorem for Variable Mass Holonomic Nonconservative Dynamical Systems with Unilateral Constrains是什么意思_Integrating Factors and Conservation Theorem for Variable Mass Holonomic Nonconservative Dynamical Systems with Unilateral Constrains在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句