名词
中文翻译：空心梁
同义词：
['hollow post', 'hollow pillar']
例句：
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1. The engineer designed a hollowbeam to support the roof.
工程师设计了一个空心梁来支撑屋顶。
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2. Theconstruction crew used hollow beams to reinforce the walls.
施工队使用空心梁加固墙壁。
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3. Thebeam was hollow, which made it easyto transport and install.
这个梁是空心的，这使得运输和安装变得容易。