短語詞組短語direct regulatory approach 制方法direct design approach 直接設計法direct algebra approach 直接代數(shù)法direct verification approach 直接核查法direct calculating approach 直接計算法direct solve approach 直接求解方法Direct synthesis approach 直接綜郃法direct mechanical approach 直接機械法A direct ktruncatd approach 直接截斷法 返回 direct approach