drop plug

例句：

1. 1.The engineer dropped the plug and started tofix the leak.
   工程师拔掉了塞子，开始修理泄漏。
2. 2. The plumber used adrop plug to stop the water flow.
   水管工使用一个漏斗塞来停止水流。
3. 3. The carpenter dropped the pluginto the hole and tightened it witha wrench.
   木匠将塞子放入孔中并用扳手拧紧。