threeunitn.三单位电码threenum.三n.三；三个adj.三个的three-halves power law二分之三方律,二分之三次方定律three-to-four-foldn.三到四倍three-direction search三方向搜索three-launcher battery三套发射装置连three thickness of cloth三层布料Three-phase four-leg三相四桥臂three-yellow-chicken三黄鸡three sheets to the windadv.大醉three agricultures issue三农问题three industrial sectors三次产业