这些前置词均含"在……之间,在……之中"之意.
among 指三者或三者以上的同类事物之间.
between 多指两者之间,但现代英语中也可指三者或三者以上,表示彼此间清楚的独立的个体关系.
among 
〔误〕 If the three apples are divided among the two boys how much will each receive?
〔正〕 If the three apples are divided among the three boys how much will each receive?
〔析〕 among常用于三个事物或人物之间,而between则多用于两者之间.