threefoleadj.三倍；增加二倍；三重的；三方面的；三次adv.三倍；增加二倍；三重地；三方面的；三次threenum.三n.三；三个adj.三个的three-phase of soil土壤三相three main components三部论Three -ring reducer三环减速器Three-Gorge Project三峡工程three division method三分法Three Representations“三个代表”three- point attack三分进攻three-dimension CAD三维CADThree-Beauty Theory“三美”本体论three-hybrid system三杂合(体)系统