动词短语
中文翻译：形成覆盖层
同义词：
['forming a mulch layer', 'creating a mulch layer', 'establishing a mulch layer']
例句：
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1. The soil was very compact, so we had to form a mulch layer to improve drainage.
土壤非常紧实，所以我们需要形成覆盖层来改善排水。
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2.To prevent weeds from growing, we need to form a mulch layer around the garden beds.
为了防止杂草生长，我们需要在花园的床周围形成覆盖层。
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3. The farmers used to form a mulch layer on top of their fields to protect the crops from harsh weather conditions.
农民过去会在他们的田地上形成覆盖层，以保护作物免受恶劣天气条件的影响。