twenty-one-mile为什么mile不加s

twenty-one-mile为什么mile不加s twenty -one-mile,这里mile为何没加复数 One mile's Love one mile是多长? she‘d like to drive car twenty-one.是神意思?为什么不是 car the twenty-one 或car twenty 0ne 或twenty-one car mile time one of mile time famous singer? twenty-one 和 twenty one 的区别 21英文为什么有的人用twenty-first ,有的人用twenty-one ,有什么不同? When reports came into London Zoo that a wild puma had been spotted forty-five miles south of London与这个句子for the puma was often observed at one place in the morning and at another place twenty miles away in the evening为什么一个在mile one hundred and twenty Twenty-one Days. twenty-one中文是什么 twenty-one是什么意思 Take Silom street for one mile One More Mile To Go 歌词 one-mile walk哪里错了 小米手机mi-one-c1 请问电影《8 mile》为什么mile不加s呢?