逆运算的英文：
inverse operation

inverse是什么意思：
n. 相反；倒转
adj. 相反的；逆向的；倒转的

The value of a fraction is inversely proportional to that of the denominator
分数值与分母值成反比例。

The recorder trace is a series of inverse peaks.
记录器扫迹是一系列相反的波峰。

The value of a fraction is inversely proportional to that of the denominator.
分数值与分母值成反比例。

The operation that is the inverse of differentiation is called integration.
与微分相反的运算叫做积分。

We call -a the additive inverse of a.
我们称-a为a的加性逆元素。

operation是什么意思：
n. 运转；行动；手术；运算

The operator O is the null operator.
算符O是零算符。

They are computer operators.
他们是计算机操作员。

monitor operator
之声监听员

It is a major operation. It is a very messy operation.
这是大手术，难度很大。

Has operator received pump instruction and operations manual?
操作者是否收到泵说明书和操作手册?