名词
中文翻译：Unknown
同义词：
['narrow girder', 'narrow truss', 'narrow beam']
例句：
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1. The engineer designed the bridge to have a narrow beam for stability.
工程师设计这座桥时，为了稳定性，选择了窄梁。
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2. The narrow beam of the roof is holding up the weight of the building.
屋顶的窄梁支撑着建筑物的重量。
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3. The narrow beam was too weak to support the weight of the heavy truck.
窄梁太弱，无法承受重型卡车的重量。