1 N-COUNT （由大量人员参与、具有高度组织性的）活动，行动，工作 An operation is a highly organized activity that involves many people doing different things. （由大量人员参与、具有高度组织性的）活动，行动，工作
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The rescue operation began on Friday afternoon.
救援行动于星期五下午开始。
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The soldiers were engaged in a military operation close to the Ugandan border.
这些士兵参加了乌干达边境附近的一次军事行动。
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...a big operation against the drugs trade.
打击毒品交易的大规模行动
2 N-COUNT 企业；公司 A business or company can be referred to as an operation . 企业；公司 [business]
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Thorn's electronics operation employs around 5,000 people.
索恩的电子公司雇用了约5,000名员工。
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The two parent groups now run their business as a single combined operation.
这两个母公司现在合并为一家企业经营业务。
3 N-COUNT 手术 When a patient has an operation, a surgeon cuts open their body in order to remove, replace, or repair a diseased or damaged part. 手术
4 N-UNCOUNT [in/out of N] 使用；运作 If a system is in operation, it is being used. 使用；运作
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Until the rail links are in operation, passengers can only travel through the tunnel by coach.
在铁路连线开通之前，乘客只能乘坐长途客车穿越隧道。
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...the free banking system that has been in operation since the early eighties.
从80年代初就开始实行的自由银行制度
5 N-UNCOUNT [in/out of N] （机器、设备等的）运转，运行 If a machine or device is in operation, it is working. （机器、设备等的）运转，运行
6 PHRASE （使）施行；（使）实行；（使）生效 When a rule, system, or plan comes into operation or you put it into operation, you begin to use it. （使）施行；（使）实行；（使）生效
Word PartnershipWord Link
| Word Partnership | Use operation with: |
| N. | relief operation, rescue operation 1 |
| ADJ. | covert operation, massive operation, military operation, undercover operation 1 major operation, successful operation 1 2 3 emergency operation 1 3 |
| VERB. | carry out an operation, plan an operation 1 perform an operation 1 3 |
| Word Link | oper ≈ work : co-operate, opera, operation |
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