three wireadj.三线针的threenum.三n.三；三个adj.三个的three main classroom systems三大课堂体系three-quarrel-river belt三江并流带three-stages pumping tests三段抽水试验three-part thinking theory思维三元理论three coordinate measurement三坐标精密测量three steps analgesic ladder三阶梯止痛three-wheel delivery lorry三轮送货汽车three-stage and two series三阶段两系列Three Movements of the Saber日套三环three electrode angle method三极夹角法