three Ps三P
threenum.三n.三;三个adj.三个的
three-layer films三层膜
three major systems三大体系
three-eighth rule八分之三法
three-layer ocean三层海洋
three-factors fit三因素匹配
three-step timing三级调速
three-demarcation三标度法
three level voltage三电平
Three media manikin三层介质人体模型
three axes pedestal三轴天线座