pillowcase

She bought a set of silk pillowcases because they are gentler on the skin and hair during sleep.

(Chinese) 她买了一套真丝枕套，因为在睡觉时它们对皮肤和头发更温和。

Don't forget to put a fresh pillowcase on the guest bed before your aunt arrives tonight.

(Chinese) 在今晚你阿姨到达之前，别忘了给客房的床上换个干净的枕套。