n.枕套(等同pillow slip)
I bought a pillowcase yesterday.
我昨天买了一个枕套.
A: Fold up your bedding, and change the pillowcase.
整理好你的床铺, 同时换一下枕套.
The spun silk is the best material for pillowcase.
绢丝是做枕套的最好料子.