Vacuum valve
[化] 真空阀
🧩 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
There are, Ellen.
一定有， Ellen。
It was a six-hour flight.
它要6小时的飞行。
Tom said that he was feeling ill.
汤姆说他不舒服。