名词
中文翻译：灰色铁块
同义词：
['grey iron', 'grey iron bar例句：1. The grey iron block is the only thing that can hold up this heavy door.（这个沉重的门只有这块灰色的铁块能支撑。）']
例句：
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1. The grey iron block is the only thing that can hold up this heavy door.
这个沉重的门只有这块灰色的铁块能支撑。
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2.The engineer used the grey iron block to reinforce the wall.
工程师用这块灰色的铁块加固了墙壁。
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3.The construction workers were using the grey iron block to build the new bridge.
建筑工人正在使用这块灰色的铁块建造新桥。