n.水壶；坑穴
The kettle is boiling. 壶里的水开了。
The switch on the kettle won't stay down. 这个水壶上的开关按下时卡不住了。
This kettle whistles when it boils. 这水壶在水开时会哔哔作响。
n.茶壶；烧水壶
n.半球形铜鼓；定音鼓
