twovalueadj.二值的twonum.二；两个two-sided eoneatenation operation双向连接运算Two-chamber shared culture medium共培养液培养two thousand one hundred and eleven(=2111) 二千一百一十一two-liner composite shaped charge双罩复合成型装药two thousand two hundred and twenty(=2220) 二千二百二十two-dimensional cross correlation二维互相关two photon micro stereo lithography双光子微细光成形two-step cylinder ejection device双级气缸式弹射装置Two-high cold-rolling pipe mill二辊式冷轧管机two dimensional normal distribution二元正态分布