walk down 和 walk along的用法,区别?

walk down 和 walk along的用法,区别? walk along, walk down, 与walk up 的详细区别 walk on和walk along的区别 WALK ALONG 和 WALK DOWN 有什么区别 walk along和walk by的区别是什么? walk down 和go down的区别 walk along和walk up什么区别 walk along walk down有什么区别?怎么用? walik up和walk down的区别? walk along GO ALONG 的区别 walk through 和walk straight的用法.区别. walk down the road walk up the road walk along the road有什么区别