operate /ˈɔpəreit/ I. vt. 操作：It is very difficult to operate the machine. 操作这台机器很难。The lift is operated by electricity. 电梯是用电开动的。‖II. vi. 1. 动手术(on)：The doctor operated on his chest yesterday. 昨天医生给他做了胸部手术。2.(机器等)运行，运转：The sewing-machine isn’t operating properly.缝纫机运转不正常。
operation /ˌɔpəˈreiʃən/ n. 1.［u］操作，开动：The operation of the machine is simple.这台机器操作很简单。bring/put…into operation实施，施行； 开动； 使运转：We remain on track to bring the new centre into operation during 2014. 目前工程进度理想，预计中心将如期于2014年落成。 in operation 在运作/工作：There are several reactors of the type in operation (= working) at the moment.如今有好几个这种型号的反应堆在运作。2.［c］手术: He is very ill and needs an operation.他病得很重，需要做手术。
operational /ˌɔpəˈreiʃənəl/ adj. 操作上的，业务上的，运转的：operational costs(expenditure) 管理成本（费用）；operational research 运用研究The new machines are not yet operational. 新机器还不能运转。
