two portadj.四端的(二端对的)twonum.二；两个two thousand one hundred and fifty eight(=2158) 二千一百五十八two thousand one hundred and forty seven(=2147) 二千一百四十七two head-on collision detonation waves爆轰波对碰two thousand one hundred and eighty four(=2184) 二千一百八十四two thousand two hundred and fifty seven(=2257) 二千二百五十七two thousand four hundred and ninety six(=2496) 二千四百九十六two thousand six hundred and fifty eight(=2658) 二千六百五十八two thousand eight hundred and sixty six(=2866) 二千八百六十六two-variable single equation estimator两段最小平方估计量two frequency superimpose addressing sch双频率重叠选址法