Flap valve
[化] 片状阀; 瓣阀
🧩 词语组成解析
flap
[flæp]
n. 扁平物;[航] 襟翼;拍打，拍打声;〈口〉不安，恐慌;
v. 上下或左右移动、摆动;轻拍;振翅而飞;
valve
[vælv]
n. 阀;真空管;（管乐器的）活栓;（心脏的）瓣膜;
vt. 装阀于;以活门调节;
🗣️ 情景例句
What has kept you so busy?
什么使你这么忙？
I've bee invited over to a friend's, and you?
有个朋友请我去作客，你呢？
Allow me.
让我来。