threedadj.三维的(立体的；体型的；有立体感的；真实的)threenum.三n.三；三个adj.三个的three-wheeladj.三个轮子的three strikes三击措施three systems三个体系three windingadj.三线圈绕组的three-pieceadj.三件一套的three addressadj.三地址的three-level三能级three sheeted三叶的three-ratio三比值法three decades三十年