push button for bell

例句：

1. 1. The clock has a push button to turn it on and off.
   这台钟有一个按钮可以打开和关闭。
2. 2.The car has a push button for starting the engine.
   这辆车有一个按钮用于启动引擎。
3. 3.The remote control has a push button to adjust the volume.
   遥控器有一个按钮来调整音量。