three pads三支撑掌threenum.三n.三；三个adj.三个的three gun color picture tube三枪彩色显象管three-wire leveling method三线读数水平测量法three bladed uterine dilator三翼子宫扩张器three standard degree method三标度法three hundred and ninety six(=396) 三百九十六three line high draft system三罗拉式大牵伸装置three dimensional body model三维实体模型three-section re-entrant三节重入式three-dimensional guidance三维制导Three landmarks stand out.经历了三个里程碑。