名词
中文翻译：Unknown
同义词：
['beam', 'girder', 'rib', 'truss']
例句：
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1. The engineer designed the bridgeto be strong enough for a large truckto pass through.
工程师设计这座桥足够坚固，可以容纳一辆大型卡车通过。
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2.The beam of light from the lamp illuminated the room.
灯发出的光束照亮了房间。
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3. The ribs of the buildingare visible through the cracks in thewall.
建筑物的肋骨从墙上的裂缝中可见。