progressive block method 级进分段焊接法

progressive part method 渐进分习法 ; 累进分部法

progressive decomposition method 渐进分解法

progressive teaching method 循序渐进的教学方法

Method of Progressive Exemption 累进免税法

progressive overflow method 顺次溢出法

progressive approach method 逐次逼近法

Progressive Evaluation Method 进步评价法