名词
中文翻译：碎石
同义词：
['cobblestone', 'cobblerstone']
例句：
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1.The path was lined with smooth, flat stones called burrstones.
小径两旁铺满了光滑的平石头，称为碎石。
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2.These burrstones have been worn smooth by years of foot traffic.
这些碎石被多年的行人往来磨损得光滑了。
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3.The old building's foundation is made of burrstones, which are difficult to replace.
这座老建筑的基础是用碎石制成的，很难更换。