threesn.祝你走运threenum.三n.三；三个adj.三个的three-gun三电子枪three rooms三间屋three areas三大地区three tiers三层three-plyadj.三层的；三重的；三股的n.三重；三股；三层夹板three trees三腿梯子three belts三带three stageadj.三级的three seals三方图章three balls当铺