bed sheet

US /ˈbed ʃiːt/
UK /ˈbed ʃiːt/
"bed sheet" picture
1.

床单, 被单

a rectangular piece of cotton or other fabric, used in pairs to cover a mattress and a sleeper on a bed

:
I need to change the bed sheets today.
我今天需要换床单
The clean bed sheets felt so soft and fresh.
干净的床单摸起来又软又清新。