名词
中文翻译：填充物
同义词：
['padding', 'cushioning cover', 'protective cover']
例句：
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1. The book has a thick layer of paper as its filler cover.
这本书有厚厚的一层纸作为填充物。
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2. The car's bumper is made of foam to provide extra protection during the filler cover.
汽车的保险杠是用泡沫制成的，以提供额外的保护，在填充物期间。
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3. The new laptop comes with a protective cover that can be removed for easy cleaning.
这款新笔记本电脑配有可拆卸的保护套，方便清洁。