average car-kilometers per transit operation

例句：

1. 1. The average temperature in New York is around 50 degrees Fahrenheit.
   纽约的平均温度大约是50华氏度。
2. 2.She works as a secretary and has an average salary.
   她是一名秘书，薪水一般。
3. 3.The average person can't lift that heavy box.
   普通人搬不动那个箱子。