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
That's nothing at all.
不用客气。
Idleness is the rust of the mind.
懒惰使脑子生锈。
Oh, who is this?
噢，这位是谁？