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Ringwaltn.林沃尔特

1. Both disorders were caused by the American tobacco ringspot virus.
   两种病害是美国烟草环斑病毒引起的。