名词
中文翻译：根的覆盖物
同义词：
['root cover', 'root mat', 'soil mound例句：1. The roots of the tree are covered by a thick layer of soil.（这棵树的根部被一层厚厚的土壤覆盖。）']
例句：
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1. The roots of the tree are covered by a thick layer of soil.
这棵树的根部被一层厚厚的土壤覆盖。
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2.The soil mound helps to protect the roots from the cold winter.
土壤堆有助于保护根系免受寒冷冬季的影响。
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3. The roots of the plant are deeply buried in the soil, providing it with nutrients and moisture.
植物的根系深深地埋入土壤中，为它提供养分和水分。