共同作业的英文：
joint operation

joint是什么意思：
adj. 联合的
n. 关节，接头
v. 链接，使有接头，焊接

The finger joints are called knuckles.
手指的关节叫做指关节。

It's a really classy joint.
这是一个确实高级的公共场所。

That shop is plain a clip joint
那可是不定一家漫天要价、大敲竹杠的商店啊!

A knobbed bone, as of a knuckle or joint.
指节骨一种圆形突出的骨头，如指关节或关节的

It is a joint venture with private industry.
这是一个与私有企业合资的企业。

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?