Return valve
[化] 回路阀
🧩 词语组成解析
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
It's a surprise.
会给你一个惊喜。
There is a black sheep in every flock.
群群羊中有黑羊。
The boys felt tired so they put out the fire and crept into their tent.
于是他们扑灭了篝火，钻进了帐篷。