operation的用法

operation [Show phonetics]
noun
1 [U] the fact of operating or being active:
There are several reactors of the type in operation (= working) at the moment.
We expect the new scheme for assessing claims to come into operation (= start working) early next year.

2 [U] the way that parts of a machine or system work together, or the process of making parts of a machine or system work together

3 [C] a business organization:
Less profitable business operations will have difficulty in finding financial support.

4 [C] an activity which is planned to achieve something:
a military/peacekeeping operation.
Following the earthquake, a large-scale rescue operation was launched.
[+ to infinitive] The operation to fly in supplies will begin as soon as possible.

operation [Show phonetics]
noun [C] (UK INFORMAL op)
when a doctor cuts a body for medical reasons in order to repair, remove or replace a diseased or damaged part:
a major/minor/routine operation
an abdominal/cataract/transplant operation
He's got to have an operation on his shoulder.
[+ to infinitive] We will know in a couple of days if the operation to restore her sight was successful.

bypass (operation) noun [C]
a medical operation in which the flow of a person's blood is changed to avoid a diseased part of their heart:
a triple bypass operation

holding operation noun [C usually singular] UK
a temporary way of dealing with a situation until a new and better way can be introduced:
This is just a holding operation until we get the new management structure sorted out.

sex change (operation) noun [C]
an operation which, together with hormone treatment, gives a man many of the characteristics of a woman, or a woman many of the characteristics a man