status indicator

例句：

1. 1.The new car has a status indicator that shows its engine size.
   新车有一个显示其发动机大小的指示灯。
2. 2. The system uses a status indicator to indicate when the battery is charging.
   该系统使用一个状态指示器来指示电池是否正在充电。
3. 3. The status indicator on the computer screen indicates that the program is running smoothly.
   计算机屏幕上的状态指示器表明程序运行得非常顺畅。