three yins三阴threenum.三n.三；三个adj.三个的Three Agriculture problems三农问题three-way control valves三路控制阀three-dimensional cursor三维定标法three-roll tandem roller三轴串联式压路机,串联式三轮压路机Three dimensional traction三维牵引three-spined stickleback三刺鱼three-carrier attachment三导纱器装置three attributes of colour彩色三属性Three-dimemional Imprint立体痕迹three toes transplantation三趾移植