名词中文翻译
中文翻译：拱心石
同义词：
['architectural feature', 'keystone例句：1. The arch centre of the bridge is made of marble.（这座桥的拱心石是由大理石制成的。）']
例句：
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1. The arch centre of the bridge is made of marble.
这座桥的拱心石是由大理石制成的。
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2.The arch centre of the building is a symbol of strength and stability.
建筑的拱心石象征着力量和稳定。
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3. The arch centre of the monument is decorated with intricate carvings.
这个纪念碑的拱心石上雕刻着复杂的图案。