This is not what I asked for, I told myself, as I slipped the door keys into an envelope, sealed it and pinned the envelope to the wall just inside the front door.
在我把门钥匙塞进一个信封、封住口并把信封钉在前门里面的墙上时，我告诉自己说，这不是我所寻求的。
2
The wall is one of the most important parts in the envelope of residential buildings.
墙体是建筑围护结构的重要组成部分。
3
The relevance conditions of interlayer ventilation wall are big envelope, big fresh air and big air conditioning loads buildings.