Two-EC双变量误差修正twonum.二；两个two thousand seven hundred and seventy seven(=2777) 二千七百七十七TWO-LINK UNIVERSAL VARIABLE ELECTRIC STOVE二联万用可调电炉two-parameter operating condition spectrum二参数工况谱Two-photon excitation fluorescence imaging双光子激发荧光成像two color time-resolved Z-scan technique双色时间分辨Z扫描技术two worktables flexible manufacturing system双工作台柔性制造系统two partly modified insect-resistant genes双抗虫基因two-double integrated staged multi-phase双层分阶段多生物相two thousand seven hundred and seventy three(=2773) 二千七百七十三two thousand eight hundred and seventy seven(=2877) 二千八百七十七