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
Please, sit down. What can I do for you?
请坐下。我能为你们做什么呢？
Modesty is not only and ornament, but also a guard to virtue.
谦逊不仅可增添光彩也可以维护美德。
What invariably happens is that a great number of things choose to go wrong at precisely the same moment.
情况经常是这样的，许许多多的事情都偏偏赶在同一时刻出问题，