1. （由大量人員參與、具有高度組織性的）活動(dòng)，行動(dòng)，工作
    An operation is a highly organized activity that involves many people doing different things.

    e.g. The rescue operation began on Friday afternoon...
           救援行動(dòng)于星期五下午開始。
    e.g. The soldiers were engaged in a military operation close to the Ugandan border.
           這些士兵參加了烏干達(dá)邊境附近的一次軍事行動(dòng)。

2. 企業(yè)；公司
    A business or company can be referred to as an operation .

    e.g. Thorn's electronics operation employs around 5,000 people...
           索恩的電子公司雇用了約5,000名員工。
    e.g. The two parent groups now run their business as a single combined operation.
           這兩個(gè)母公司現(xiàn)在合并為一家企業(yè)經(jīng)營(yíng)業(yè)務(wù)。

3. 手術(shù)
    When a patient has an operation, a surgeon cuts open their body in order to remove, replace, or repair a diseased or damaged part.

operation

    e.g. Charles was at the clinic recovering from an operation on his arm.
           查爾斯的胳膊動(dòng)了手術(shù)，正在這家診所進(jìn)行康復(fù)治療。

4. 使用；運(yùn)作
    If a system is in operation, it is being used.

    e.g. Until the rail links are in operation, passengers can only travel through the tunnel by coach.
           在鐵路連線開通之前，乘客只能乘坐長(zhǎng)途客車穿越隧道。
    e.g. ...the free banking system that has been in operation since the early eighties.
           從80年代初就開始實(shí)行的自由銀行制度

5. （機(jī)器、設(shè)備等的）運(yùn)轉(zhuǎn)，運(yùn)行
    If a machine or device is in operation, it is working.

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    e.g. There are three ski lifts in operation.
           有3臺(tái)滑雪纜車在運(yùn)行。

6. （使）施行；（使）實(shí)行；（使）生效
    When a rule, system, or plan comes into operation or you put it into operation, you begin to use it.

    e.g. The Financial Services Act came into operation four years ago...
           《金融服務(wù)法》于4年前開始實(shí)施。
    e.g. Cheaper energy conservation techniques have been put into operation in the developed world.
           更經(jīng)濟(jì)的節(jié)能技術(shù)在發(fā)達(dá)國(guó)家已經(jīng)投入使用。