他有急事求见经理.He asked to see the manager for something urgent.因有急事我不能去参加会议.Urgent business kept me from attending the meeting.遇上急事,谁也保不住迷头.No one can guarantee to keep his head in a tight spot....
The pistons are graphite-coated to reduce friction.活塞上涂了一层石墨以减小摩擦力。the coefficient of friction摩擦系数When Joan returned to work, the friction between them increased.琼回来工作后, 他们之间的摩擦加剧了....