Three As三个自动化threenum.三n.三；三个adj.三个的three-way tube[化] 三通管three-division三雏three-way type三通道型three-quartersn.四分之三threephase motor三相电动机three-went way三岔路口three side views三视图three-D design三维设计three-way lamp三向灯three-way cock三通活栓,三通开关,三通旋塞