bed cover和 fitted sheet 是一样的么?

bed cover和 fitted sheet 是一样的么? 请问fitted sheet 和flat sheet （急! cover by和cover with的区别 we use a bed cover to keep the dust off 求suitable和fitted的区别有没有 be fitted for sth?最好能举一些简单的词组 cover cover cover cover cover cover cover include和cover的区别 cover的用法和意思 cover和includede的区别 be cover with和be cover by的区别 cover和include和including的区别? while in bed we must not cover our head to get enough frest air 翻译