threepennyadj.三便士的；无价值的；便宜的threenum.三n.三；三个adj.三个的three motorself-synchronously三电机自同步three-channel recording paper三导程记录纸three thousand and ninety seven(=3097) 三千零九十七three thousand and ninety three(=3093) 三千零九十三three-dimensional acquisition三维捕获three-phase rectifier circuit三相整流电路three hundred and seventy seven(=377) 三百七十七three-compartment subdivision三舱不沉制three thousand and twenty eight(=3028) 三千零二十八three hydraulic couplings model三台液力偶合器模型