operator
/ˈɔpəreɪtə(r); `ɑpəˌretɚ/ n
1 person who operates equipment, a machine, etc （设备、 机器等的）操作者
a lift operator 电梯操作员
a computer operator 计算机操作员.
2 person who operates a telephone switchboard at the exchange 电话接线员
Dial 100 for the operator. 拨100找接线员.
3 person who operates or owns a business or an industry (esp a private one) 经营者（尤指私人工商业的）
a private operator in civil aviation 私营民航企业家
Our holiday was cancelled when the travel operator went bankrupt. 旅行社破产了, 我们度假的事取消了.
4 (infml esp derog 口, 尤作贬义) person acting in the specified (esp cunning) way 有某种（尤指狡滑的）行为的人
He's a smooth/slick/shrewd/clever operator. 他是个圆滑的[狡滑的/精明的/聪明的]人.