two all二平twonum.二；两个two-phase operation两相运行two subcarrier system双副载波制,双副载波系统two-stage autoclave二次压煮two-stage operation二期手术two-to-one folder一裁二份折页器two-point threshold两点阈two stage compression两级压缩two-digit inflation[经] 两位数的通货膨胀two-stages recovery两段回收two resistance theory双阻力理论