walk downstairs嘛意思?

walk downstairs嘛意思? downstairs是啥意思? downstairs的意思,词性 downstairs downstairs.. Do you hear my mother walking downstairs?为什么用该walking不用walk? Do you hear my mother walking downstairs?为什么用walking不用walk? rush 还有cosmetics painter downstairs的意思啊 walk through的意思 walk alone 什么意思 walk sb dwon 意思 walk up的意思