Non-return flap valve
[化] 止回阀
🧩 词语组成解析
non
[[nɔn]]
adv. 非, 不
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
She has to work late tonight.
她今晚得工作得晚一些。
You agreed that we could make a little change in design if necessary.
可你们曾经答应这，如有必要，图案可以稍作改动。
During the journey, their boat began to sink.
途中，船开始下沉，