two gaps二间隙twonum.二；两个two thousand two hundred and ninety two(=2292) 二千二百九十二Two-sound-and-several-frequency双音多频two antennas single pass interferometry双天线单航过法two side-by-side circular cylinders横向排列双圆柱two-dimensional liquid chromatography二维液相色谱two thousand two hundred and forty nine(=2249) 二千二百四十九two thousand two hundred and forty five(=2245) 二千二百四十五two thousand four hundred and fifty two(=2452) 二千四百五十二two thousand one hundred and twenty two(=2122) 二千一百二十二Two - dimensional Engineering Drawing二维工程图