average cleared credit balance

例句：

1. 1.The average temperature in the city is 20 degrees Celsius.
   这个城市的平均温度是20摄氏度。
2. 2. The average income of a doctor is around $150,000 per year.
   医生的平均年收入约为15万美元。
3. 3.The average lifespan for humans is about 75 years.
   人类的平均寿命大约是75岁。