operation/ˌɒpə'reɪ∫ən $ ˌɑː-/

n.

➊ the process of cutting into sb's body to remove or repair a part that is damaged

➋ the process making a machine or system work

n.

➊ [C] 手术：[operation on sb /sb's arm] He's having(或under) an operation on his face. 他正在做脸部手术。

◇Doctors are performing an emergency operation. 医生们在动一个紧急手术。

➋ [U] 操作：Operation of the machine is easy. 这台机器的操作很简单。

◇The device is in operation. 设备正在运转。

构词operate + -ion

常犯错误

✗ take an operation

✓ have an operation 做（或：接受）手术