Hand valve
[化] 手动阀门
🧩 词语组成解析
hand
[hænd]
n. 手;协助，帮助;（工具等的）把，柄;掌管;
vt. 传递，交给;搀扶;支持;
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
The scary part's leaving home and moving to college.
害怕的是要离开家搬到学校去。
Who are you writing to?
你正在写信给谁？
He earned enormous sums of money and was paid as much as
100 for a single appearance.