Two-EC双变量误差修正twonum.二；两个two-dimensional coupled quantum oscillator二维耦合量子谐振子two frequencies variable frequency generator双频变频发电机Two-stage gasoline direct injection engine两段喷射直喷汽油机（TSGDI）two-dimensional electromagnetic scattering二维电磁散射two-stage compression refrigeration system双级压缩制冷系统two thousand eight hundred and seventy three(=2873) 二千八百七十三two generations for landscaping undertakings园林事业两代人two-tier hierarchical network architecture二层分簇网络架构two-dimensional closely spaced frequencies二维密集频率Two-Dimensional Alphanumeric Picture System二维字母数字图像系统