名词

1.可数名词：衬层，内衬，衬里

2.不可数名词：（身体器官内壁的）膜

英语解释

a protective covering that protects an inside surface

the act of attaching an inside lining (to a garment or curtain etc.)

a piece of cloth that is used as the inside surface of a garment

providing something with a surface of a different material