ringn.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ringupn.呼叫振铃

1. The hole size is limited by the ring thickness.
   螺孔的大小受套圈厚度的限制。
2. Inner raceway grinding is more difficult in bearing ring production.
   轴承内圆磨削加工是轴承套圈磨削加工比较困难的工序。