The olympic games will be held in our country in four years' time. in four years 中 in 可换 after?1、……in four years 和……at four years ……after four years 有什么区别?2、表达 4年内 怎么表达呢?

问题描述:

The olympic games will be held in our country in four years' time. in four years 中 in 可换 after?
1、……in four years 和……at four years ……after four years 有什么区别?
2、表达 4年内 怎么表达呢?