Three As三个自动化threenum.三n.三；三个adj.三个的three-high mill三辊轧机,三辊式轧机three-beam tube三束管,三注管three hinged arch三铰拱Three referees.三位。three main stages三个主要阶段three agriculture三农three-shear ewe三岁母羊three-tube pump三管泵three start screw[机] 三头螺纹three-way cross三源杂交