In view of a collapse accident of the roof-fram, the strength and the stability of a collapsed roof-fram is analysed in detail.
本文针对一起屋架坍塌事故,详尽分析了坍塌屋架的强度及稳定性。
The pillars gave way and a section of the roof collapsed.
这些立柱坍塌了,一部分屋顶坠落下来。
The roof collapsed under the weight of snow.
房顶在雪的重压下突然坍塌下来。
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