手术灯照亮了手术区域。

The surgical lights illuminate the ___operating area.

这台机器现在运行得比之前更顺畅了。

The machine is ___operating much smoother than before.

他在这个城市经营着三家餐厅。

He is ___operating three restaurants in this city.

外科医生正在手术室里为病人做手术。

The surgeon is ___operating on a patient in the operating room.