To the house of bricky structure , rock - bottom wall body area is large , the wall body area of superstratum is small , so similar unit , upstairs and downstair cover inside practical area or meeting discriminating ; same layer will tell , although be covered identically inside floor area , cover the unit of the unit inter of horn that compare clip inside usable floor area also is met a few smaller 对砖结构的房子来说，底层的墙体面积厚，上层的墙体面积薄，所以同样的单元，楼上楼下的套内实用面积还是会有差别的；同一层来讲，即使相同的套内建筑面积，把角的单元比夹在中间的单元套内使用面积也会小一些。
He just looked in at the doors i opened ; and when he had wandered upstairs and downstairs , he said i must have gone through a great deal of fatigue and trouble to have effected such considerable changes in so short a time : but not a syllable did he utter indicating pleasure in the improved aspect of his abode 我好不容易说动他到房子里去走一走，他也不过是往我替他打开的门里瞧了一瞧。他楼上楼下转了一圈后说，准是费了很大一番劳累和麻烦，才能在那么短时间内带来如此可观的变化。
