two gaps二间隙twonum.二；两个two-mirror-type radiation pyrometer双镜式辐射高温计two thousand nine hundred and sixty six(=2966) 二千九百六十六two-parameter adaptive control system双参数自适应控制系统two-dimensional numerical integration二重数值积分two-order particle swarm optimization二阶微粒群算法Two dollars and seventy-five cents.二美元七角五分。two thousand five hundred and sixty six(=2566) 二千五百六十六two thousand one hundred and forty four(=2144) 二千一百四十四two thousand two hundred and thirty six(=2236) 二千二百三十六two stage side core-pulling mechanism二级侧抽芯机构