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1.The engineer designed the new building with abrace of roof trusses.
工程师设计了这座新建筑，使用了一组屋顶桁架。
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2. The constructioncrew installed the braceof roof trusses beforestarting the demolition.
施工队在开始拆除之前安装了这组屋顶桁架。
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3. The architect chose this design because itprovides a strong and stable structure for thebrace of roof trusses.
建筑师选择了这种设计，因为它为屋顶桁架提供了坚固和稳定的结构。