问题描述： 请问：walk up and 1个回答 分类：综合 2014-12-11 问题解答： 我来补答 walk up and down来回走着1.The chairman got up and began to walk up and down.主席站了起来,开始来回走动.2.Stand up every two hours,walk up and down the plane.每两个小时就在飞机上走动一下. 展开全文阅读
