1.operation作“操作,运转,经营”解时,是不可数名词,主要用于美式英语中。
2.operation作“手术”“(军事)行动,活动”“运算”解时,是可数名词。
3.operation在句中可用作定语修饰其他名词。

be in operation
实施中 carry out
The school has now been in operation for several days.学校开学已经好几天了。
It's often easier to make plans than it is in operation.制订计划常比执行计划容易些。

come into operation
生效 make sth such as a law to begin to come into effect
The new law will come into operation by midnight tomorrow.新法律于明日午夜生效。
The new currency regulations of the government are going to come into operation.政府的新币规定将生效。

put into operation
使处于某种状态 make sth be in a state of
▲put sth into operation
It's a wonderful scheme, and he's just the man to put it into operation.这是一个很好的计划,而他正是实施这个计划的人选。
The regulations have been put into operation on a trial basis.这些规定已开始试行。

They were also given the opportunity to do some operations.他们也有机会亲自去操作。
The difficult operation will exact all the doctor's skill.这困难的手术将需要这位医生拿出全部本领来。
The operation unavoidably caused the patient much pain.手术不免会导致病人更多的疼痛。
The young nurse was very nervous when she assisted at her first operation.这位年轻的女护士首次当手术助手时,心情非常紧张。
You'll be glad to get your operation over.你做完手术就会高兴了。
It was not the operation, but the fever that followed, which finished him off.不是手术,而是手术后的发烧使他死亡的。
The patient is coming along well after the operation.手术后病人健康状况良好。
Then he bent over the patient to start the operation.然后他俯身开始给病人做手术。
We must coordinate our operations with theirs.我们必须使我们的军事行动和他们的协调一致。
The operation caused serious concern to the Government.局势引起政府的严重不安。
This will enhance our operation effectiveness.这会提高我们的工作效率。

operation, act, action, deed
参见act条。

这孩子得做手术。
［误］  The child has got to do an operation.
［误］  The child has got to make an operation.
［正］  The child has got to have an operation.
［正］  The child has got to perform an operation.
［析］  “做手术”是have〔perform〕 an operation,不可以说do〔make〕 an operation。

［同义词］   action, activity, affair, course, deal, effect, exercise, force, process, use, working