名词
中文翻译：粗砂砾石
同义词：
['cobblestone', 'gravel']
例句：
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1.The road was covered in coarse gravel when it rained.
下雨时，这条道路覆盖着粗砂砾。
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2. He walked over the coarse gravel to get to his car.
他走过粗砂砾走到他的车那里。
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3.The old house had been built on a bed of coarse gravel.
这座旧房子建在粗砂砾上。