ring n.戒指；环；圈；拳击场；马戏场；帮派n.铃声；钟声；电话；口气v.包围；环绕；形成圈v.打电话；回响；鸣响；按铃；听上去
双语例句
Worn teeth on ring gear or drive pinion gear. 环形齿轮或驱动小齿轮上齿磨损。
As long as the truck is moving in a straight line, the ring gear, differential gears, and drive axles turn together without variation of speed. 当卡车直线行驶的时候，环形齿轮，差速器齿轮和驱动轴便会无变速的一起转动。
