1. in operation : 运转着, 生效；

1. The general was in command of operations in the north.
    将军负责指挥北方的作战行动。

2. The operation of this machine is simple.
    这个机器的操作很简单。

3. The rescue operation lasted three days.
    救援活动持续了三天。

4. operation

4. When does the law come into operation?
    新的法律什么时候生效？

5. The operation of natural law is constant.
    自然法则的作用是永恒的。

1. operation：o; 运算

1. （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.

    e.g. The rescue operation began on Friday afternoon...
           救援行动于星期五下午开始。
    e.g. 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。

2. 企业；公司
    A business or company can be referred to as an operation .

    e.g. Thorn''s electronics operation employs around 5,000 people...
           索恩的电子公司雇用了约5,000名员工。
    e.g. 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. 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.

    e.g. Charles was at the clinic recovering from an operation on his arm.
           查尔斯的胳膊动了手术，正在这家诊所进行康复治疗。

4. 使用；运作
    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.
           在铁路连线开通之前，乘客只能乘坐长途客车穿越隧道。
    e.g. ...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. （机器、设备等的）运转，运行
    If a machine or device is in operation, it is working.

    e.g. There are three ski lifts in operation.
           有3台滑雪缆车在运行。

6. （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.

danci.edu.pub

    e.g. The Financial Services Act came into operation four years ago...
           《金融服务法》于4年前开始实施。
    e.g. Cheaper energy conservation techniques have been put into operation in the developed world.
           更经济的节能技术在发达国家已经投入使用。

1. the activity of operating something (a machine or business etc.)

    e.g. her smooth operation of the vehicle gave us a surprisingly comfortable ride

2. a planned activity involving many people performing various actions

    e.g. they organized a rescue operation
           the biggest police operation in French history
           running a restaurant is quite an operation
           consolidate the companies various operations

3. a process or series of acts especially of a practical or mechanical nature involved in a particular form of work

    e.g. the operations in building a house
           certain machine tool operations

    Synonym: procedure

4. a medical procedure involving an incision with instruments
    performed to repair damage or arrest disease in a living body

    e.g. they will schedule the operation as soon as an operating room is available
           he died while undergoing surgery

    Synonym: surgerysurgical operationsurgical proceduresurgical process

5. (mathematics) calculation by mathematical methods

    e.g. the problems at the end of the chapter demonstrated the mathematical processes involved in the derivation
           they were learning the basic operations of arithmetic

    Synonym: mathematical processmathematical operation

6. activity by a military or naval force (as a maneuver or campaign)

    e.g. it was a joint operation of the navy and air force

    Synonym: military operation

7. a business especially one run on a large scale

    e.g. a large-scale farming operation
           a multinational operation
           they paid taxes on every stage of the operation
           they had to consolidate their operations

8. (psychology) the performance of some composite cognitive activity
    an operation that affects mental contents

    e.g. the process of thinking
           the cognitive operation of remembering

    Synonym: processcognitive processmental processcognitive operation

9. (computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction)

    e.g. it can perform millions of operations per second

10. process or manner of functioning or operating

    e.g. the power of its engine determines its operation
           the plane''s operation in high winds
           they compared the cooking performance of each oven
           the jet''s performance conformed to high standards

    Synonym: functioningperformance

11. the state of being in effect or being operative

      e.g. that rule is no longer in operation