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operatory
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operator
算子;经营者;算符;接线员;操作者;话务员;司机;驾驶员;骗子;资方;机务员;电话兵; …
operators
算子;经营者;算符;接线员;操作者;话务员;司机;驾驶员;骗子;资方;机务员;电话兵; …
operate on
对...施行手术;用...开动
upper story
二楼;头脑