前者表示“两个或两部分中的另一个或另一部分”,One...the other...,即后面可加单数名词也可加复数名词
I have two brothers ,one is a teacher,the other is a worker.
A clock has 3 hands .one is short ,the other hands are long .
后者则表示“别的任何一个”后面只能加单数名词.
Li is the taller than any other student in his class.