expression conversion的用法和樣例：
例句
- The use of expression such as these for the aerodynamic forces converts the differential equations of motion into integro-differential equations.
如對空氣動(dòng)力采用這類(lèi)表達式，就將運動(dòng)的微分方程變換成積分微分方程。 - The general expression for determining deflections of the stepped shaft is developed using a method combining singularity functions with Laplace transformations.
利用奇異函數與拉普拉斯變換相結合的方法，導出了階梯軸彎曲變形的普遍表達式。
