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
He'll do anything to avoid getting down to math lessons,
他老是设法想逃避数学，
Next week I must start my term paper for Poli Sci.
到下周，我必须着手写政治学的期末论文了。
and even described the way they were done up in bundles.
还说了报纸捆扎的情况。