床单在英语中被称为"sheet"。它的来源可能源于古英语中的"scéat"，这个词指的是一块平整的物体。

例句：

I need to change the sheets on my bed. 我需要换床单。

The sheets were stained with wine. 床单上有酒渍。

She folded the sheet and put it in the drawer. 她把床单折叠好放进抽屉里。