例句：

　　An ambulance drove past.

　　一輛救護(hù)車駛了過(guò)去。

　　Ambulance crews were tending to the injured.

　　救護(hù)車上的救護(hù)人員在照料受傷者。

　　When the ambulance had gone, the crowd dissolved.

　　救護(hù)車離開后人群便散了。