这两句英语有区别吗?这句话中in 与within有区别吗?the bird covered the distance i

这两句英语有区别吗?这句话中in 与within有区别吗?the bird covered the distance i at distance和in the distance有什么区别吗? at a distance 和 in the distance 有什么区别? 我现在正在学新概念英语第二册,the bird covered the distance in three minute in distance与in the distance的区别 in the distance 与at a distance 区别 in与within有什么区别 in the distance和 at distance区别 The bird covered the distance( in )three minutes.在三分钟之内.It w the bird covered the distance in three minutes 这里的 cover怎么回事 The bird covered the distance in three minutes.时态为?助动词 对cove 新二Lesson 5 中有一句 The bird covered the distance in three minut