Piston valve
[机] 活塞阀
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
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
Is a letter of credit OK?
用信用卡可以吗？
The abundance of money ruins youth.
钱多毁青年。
Yes, speaking. Just a moment. Let me turn the music down. There, that's better.
是的，我就是。请稍等。让我把音量关小一点。你瞧，好多啦。