operation
[.ɔpə'reiʃən]
n.操作, 运转, 经营, 行动, 手术, 运算, 生效, （复）运筹学
例句与用法：
The surgeon has performed the operation.
外科医生做了手术。
The gown a surgeon wears during an operation is usually green.
外科医生在做手术时穿的手术服通常是绿色的。
The government underwrotethe initial costs of the operation.
政府为该项活动提供了开办时所需的费用。
When does the new law come into operation?
这项新法律何时生效？
The surgeon is performing a delicate operation.
那位外科医生正在做一个很精细的手术。
详细释义：
n.
1. 操作; 运转[U]
The operation of this machine is simple.
这个机器的操作很简单。
2. 经营; 营运[U]
The operation of a railroad needs many men.
铁路的营运需要很多人。
3. 作用; 效力[U][C]
The operation of natural law is constant.
自然法则的作用是永恒的。
4. 活动; 工作; 事[C][P1]
The rescue operation lasted three days.
救援活动持续了三天。
5. 【医】手术[C][(+on/for)]
Her father underwent a major operation last week.
她父亲上周动了一次大手术。
6. 军事行动, 作战[C][P1]
The general was in command of operations in the north.
将军负责指挥北方的作战行动。
7. 交易, 买卖[C][P1]
He continued his operations in cotton futures.
他继续进行棉花期货交易。
8. 【数】运算[C]
9. (尤指法律文件的)生效[U]
短语词组：
come into operation
1. 实施
When does the plan come into operation?
这计划什么时候实施?