Valve cover
[化] 阀套
🧩 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
Is it too early to call Mr. Carlson?
现在打电话给Carlson先生会不会太早了？
I often do home work in the afternoon.
我常常在下午做功课。
Not at all, smiled Lucy. You're welcome!
“没关系，”露茜笑着说，“不用谢！”