Things of a kind come together.People of a mind fall into the same group.(物以类聚，人以群分。)People always like contacting the person who is the same with themselves.(人们往往喜欢与自己相同的人交往。)So we can deduce a person's behaviour from his friends.(所以，我们可以根据一个人的朋友来推断他的为人。)
自己所答， 望采纳。。。...
Birds of a feather flock together. People always like to be with someone who shares a same personality with them. In brief, we can judging ones personality by his friends....
