差并 meaning in Chinese

difference

Differential shunt motor
差并励电动机
But some educators think year - round schooling especially helps students from poor families that lack educational support at home
但是有些教育家认为全年制的需阿西有助于那些家里条件差并缺少教育协助的学生。
With all the gross errors removed from observations by using quad method , the parameter estimators are relatively reliable and the precision is relatively high
找到观测值中的所有粗差并将其剔除，得到比较可靠的参数估值，提高了估计精度。