indicator driving star jumper

例句：

1. 1.The traffic light is an indicator of the road conditions.
   交通灯是道路状况的指示。
2. 2. The temperature indicator on the thermometer shows that it's 70 degrees Fahrenheit.
   温度计上的示温器显示温度为华氏70度。
3. 3. The new product launch is an indicator of future sales.
   新产品的推出预示着未来的销售情况。