短語詞組短語mean value first -order second-moment method 均值一次二階矩方法advanced first -order second-moment method 改進(jìn)的一次二階矩法adapted first -order second-moment method 改進(jìn)的一次二階矩法ameliorative first -order second-moment method 改進(jìn)一次二階矩法improved first -order second-moment method 一次二階矩法Integral first -order second moment method 積分一次二階矩法 返回 first-order second-moment method