every one 可指人,也可指物
everyone everybody两者相等,都指人
one...the other指一共有两个/者:一个.另一个.
There are two bags on the sofa; one is red,and the other is blue.
one...another三者或三者以上
There are three bags on the sofa.One is red,another is blue and another is black.
one another 还可表示“相互,互相”There are some boys there and they are talking to one another.