three rowadj.三行的
threenum.三n.三;三个adj.三个的
three tier structure三层结构
three-row keyboard三行键盘
three-square scale三棱尺
three-state output[计] 三态输出
three-shift system三班制
three-phase bubble三相泡沫
three-pen recorder三笔记录仪
three major diseases三大疾病
three ammeter method三安培计法
three-stable state三稳态