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
I'm too sick to even get out of bed.
我病得都下不了床了。
I wish you had called me back the next day,as I had asked you to.
我希望你明天打电话给了我回来,正如我要你做的。
It has long been known that the hunting scenes depicted on walls were not simply a form of artistic expression.
大家早就知道，画在墙上的狩猎图景并不是单纯的艺术表现形式，