恒等算子的英文：
identity operator
n. 身份；同一性；一致；特性；个性；恒等式
Your appearance is identical to hers.
你的相貌和她的一模一样。
They're wearing identical clothes.
他们穿着完全相同的衣服。
The police have no clue to his identity.
警察没有可以确定他的身份的任何线索。
We reach an identity of views.
我们取得完全一致的看法。
These two designs are almost identical.
这两种式样几乎完全相同。
n. 操作者，技工；电话接线员；经营者；运营公司；精明圆滑的人
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?