指特定的两个人或物中的“一个.另一个时”,只能用 one...the other
例句：I have two brothers.One is a lawyer and the other is a manager.
one...other一般不常见,用于非特定的两个人或物中的“一个.另一个”
one…the other与some…others这是两组常一起连用的代词短语,指两者之间.前者用于单数,后者用于复数.
例句：They have different ideas about how to spend their weekend.Some think that it is good to have a party,others prefer to have an outing.
some...others 表示一些人……另外一些人
some...the others 表示一些人……其他所有人
前者others是剩下的人中的一部分,后者the others是剩下的人的全部.
比如说教室里有50个人,Some are boys,and the others are girls.