名词中文翻译
中文翻译：沙砾垫层
同义词：
['sand and gravel cushion', 'sandy gravel cushion']
例句：
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1. The construction crew was busy laying down the sand-gravel cushion for the new road.
施工队正在铺设新道路的沙砾垫层。
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2.The sand-gravel cushion is a natural barrier that helps to prevent soil erosion.
沙砾垫层是一种自然屏障，有助于防止土壤侵蚀。
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3. The sand-gravel cushion is used as a base layer in many construction projects.
沙砾垫层在许多建设项目中用作基础层。