题目内容：

between 和 among
They found a relationship between recent browsing by animals,the growth of prickly leaves,and methylation.
这里是三者之间的关系,为什么不用among 而用between?

优质解答

between指两者之间
among 指三者或三者以上之间
指relationship （关系）时,必须用 between .
不管是几者,关系一定是两两之间的关系.