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
A new technique is practiced in the EPB shield tunneling construction,which erected the ring in whole on the ground and then hung the ring down to the tunnel. 盾构管片在地面上拼装成环后再吊下组装是此前没有见诸报道的新工艺。
