是的,我也觉的应用each of
Each of the three factors is applied to one group,respectively.
3个factor每个分别安排到1组那我可以这么说么：Three factors are applied to the three groups.我不会这么说如果你的句子去掉respectively语法和意思还正确吗？没有repectively，意思就不对了拜托你在想一个不带副词的句子T^T Thanks!!你一定要给我加分……respectively用在正式场合非常多的，我想不出更好的词了Each of the three factors is applied to one corresponding group. 这应该也可以