There were 2,250 policemen on duty in and around the stadium.在体育场内及周边有2,250名警察在值勤。Extra staff had been put on duty.编外人员已经就职。He's on duty twenty-four seven.他不分昼夜地天天上班。...
The white sails billow with the breezes they catch.一张张白帆随着微风舞动。A door shuts with a bang and curtains billow into the room.房门砰地一声关上了,窗帘被风翻卷着吹向屋内.He exhaled a billow of cigar smoke.他吐出一股雪茄烟....