calculusn.微积分；算法；结石calculus of upper urinary tract上尿路结石calculus of cariations in large大范围变分学calculus of lower urinary tract下尿路结石calculus of communicating system通信系统演算calculus of extrahepatic bile duct肝外胆管结石calculus of propositional function命题的函项演算Calculus of kidney and Ureterolith肾与输尿管结石calculus Self-made separated hook自制分离钩calculus in diverticulum of bladder膀胱憩室结石Calculus incarceration in gallbladder胆囊结石嵌顿

1. No matter whether you use geometry, trigonometry or calculus, you use the simple rules of arithmetic.
   无论你使用几何学，三角形学或者微积分法，你都用到了简单的算术方法。