名词
中文翻译：砂砾
同义词：
['clay', 'silt', 'sand']
例句：
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1. The river flows through the town with a thick layer of grit.
这条河穿过城镇，河床上有一层厚厚的砂砾。
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2. The farmer had to dig his way through the thick layer of grit on the field.
农民不得不在他的田地上挖出一条通道来。
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3. The engineer used grit to smooth the surface of the road before it was paved.
工程师在铺设道路之前使用砂砾来平滑路面。