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
Oh, I'm so happy, Harry!
噢， 我太高兴了， Harry！
Christmas comes but once a year.
佳节良辰，机会难得。
This decline in vigour with the passing of time is called ageing.
生命力随时间的流失而衰退叫做衰老。