He was to keep watch in the lighthouse.

该他到灯塔上。

The officers on duty were visibly overcome, many of them in tears.

那些官员明显持，许多人都流出了眼泪。

The patrol police on duty are on the alert against any possible disturbances.

"巡警处于戒备状态,随时准备应付任何可发生骚乱。"

In addition to these arrangements, extra ambulances will be on duty until midnight.

除了这些安排以外，还增派救护车到午夜。

The man on duty rang an alarm.

员发出警报。

There is a nurse in attendance.

有一位护。

Eight are on duty.

八个人在。

Six are on duty.

六个人在。