n.残留物;遗物;宿醉
This procedure is a hangover from the old system. 这样的程序是从旧制度那里沿袭下来的。
John is sleeping off the hangover. 约翰睡了一觉,才从宿醉中醒来。
Oh, I can not do my work with this hangover. 啊,因为宿醉,工作做不下去。