It's important to keep the bed clean and dry.

重要的是要保持清洁和干燥的床上。

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To keep the bed clean, you should use a bedspread.

为了保持床的洁净，你应该铺上床罩。

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Also, you can take the protectors off and wash them and they prevent mold from forming inside the bed and get keep the bed fresher overall.

你还可以把保护装置拿掉，洗干净，它们可以阻止材料在床垫里凝结，这会让整个床垫保持舒爽。

youdao

He added that the campaign to keep the 18-bed hospice open had been "heart-warming".

BBC: Staunton Harold Hall, Leicestershire

With one child awake, it was impossible to keep the other three in bed.

CNN: Excerpt: The calm before Katrina

His little brother, Joshua, tries to keep on sleeping in the bed they share.

BBC: News | NEWSNIGHT | Military academies transcript