three laws三个规律threenum.三n.三；三个adj.三个的Three dimensional packaging三维封装three-dimensional drawing三维绘图three direction DEXEL model三向DEXEL模型three basketball tournament三人制篮球运动Three wishes to be exact.具体有三个愿望。three-winding transformer三线圈变压器,三绕组变压器Three-point bend specimen三点弯曲试样Three-level PWM rectifier三电平PWM整流器three-dimensional blender三维混料three thousand and nineteen(=3019) 三千零十九