一名熟练的起重机操作员小心地将钢梁吊装到位。

A skilled crane ___operator carefully lifted the steel beam into place.

她曾在一家印刷公司担任麦金塔电脑操作员。

She worked as a Macintosh ___operator at a printing company.

列车操作员通过内部通信系统播报了下一站。

The train ___operator announced the next station over the intercom.