approximate calculation的用法和样例：
例句
- At last, the approximate calculation methods of pore water pressure and flowing pressure are presented.
给出土坡稳定性分析中对孔隙水压力和动水压力的近似计算方法。 - The capacitor with adjustable inductance is analyzed here,and the approximate calculating formula is proposed.
主要讨论了电感可调的电容器，及其电感的近似计算公式。
