a thin piece of skin that covers or connects parts of a person's or animal's body
发音
例句
1. A vibrating membrane in the ear helps to convey sounds to the brain. 耳膜的振动帮助声音传送到大脑。 2. A plastic membrane serves as selective diffusion barrier. 一层塑料薄膜起着选择性渗透屏障的作用。