The office had collected a blue layer of cigarette smoke near the ceiling.
办公室天花板下聚集了一层蓝色的香烟烟雾。
This is an office building. It is a multi–layer reinforced concrete frame.
本工程为丹东职业中专办公楼，为多层现浇钢筋混凝土框架结构。
This is an office building. It is a multi–layer reinforced concrete frame.
本工程为丹东职业中专办公楼，为多层现浇钢筋混凝土框架结构。
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