threeleveladj.三级的threenum.三n.三；三个adj.三个的three orientations of culture文化三路向three-dimensional spiral CT三维螺旋计算机断层成像(术)three-phase conducting wire三相导线Three-phase bridge inverter三相桥逆变器Three times four is twelve.三乘四等于十二。three-dimensional lee waves三维背风波Three-dimensional conformal三维适形three thousand and thirty two(=3032) 三千零三十二Three Rivers Headwater RegionThree kinds of hors d'oeuvres