average distance of passenger travel

例句：

1. 1. The average temperature inNew York is 59 degrees Fahrenheit.
   纽约的平均温度是华氏59度。
2. 2. Theaverage income for a doctoris $200,000 per year.
   医生的平均年收入是20万美元。
3. 3. The averagelifespan of a human being is about75 years.
   人类的平均寿命大约是75岁。