balance indicator

例句：

1. 1.The balance indicator on the scale is showing a weight of 20 kilograms.
   秤上的平衡指示器显示重量为20公斤。
2. 2. The balance indicator in the system indicates that the fuel supply has been interrupted.
   系统中的平衡指示器表明燃料供应中断了。
3. 3. The balance indicator is used to measure the difference between two numbers.
   平衡指示器用于测量两个数字之间的差值。