名词
中文翻译：主梁
同义词：
['main beam', 'main girder', 'mainstay beam']
例句：
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1. Theengineer carefully measured the length of the subject beam before cutting it.
工程师仔细测量了主梁的长度，然后才进行切割。
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2.The construction crew was working on the subject beam when a sudden gust of wind blew through the area.
施工队伍正在主梁上作业时，一阵突如其来的风刮过。
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3. The beam was so strong that it could support the weight of the entire building.
这个梁非常坚固，足以支撑整个建筑的重量。