threeling三连晶threenum.三n.三；三个adj.三个的Three parameters control三元控制three dimensional memory三维存储器three-component system三组分物系three dimensional strain三维应变three-slitting rolling三切分轧制three-dimensional model三维模型three-dimensional graph三维空间图three time world champion三届世界冠军three - dimensional GIS三维地理信息系统three-D cavitation flow三维空化湍流