名词
中文翻译：自然覆盖物
同义词：
['natural protection', 'natural barrier']
例句：
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1. The forest provides a natural cover for the animals.
森林为动物提供了天然的掩护。
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2. The team used natural barriers to protect their crops from pests.
团队利用天然屏障来保护他们的作物免受害虫侵害。
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3.The researchers found that the natural cover of the forest helped to prevent soil erosion.
研究人员发现，森林的自然覆盖有助于防止土壤侵蚀。