average detention time of car in transit

例句：

1. 1. The average temperature in winter is belowfreezing point.
   冬天的平均气温低于冰点。
2. 2.The average salary for a software engineer isaround $70,000per year.
   软件工程师的平均年薪约为7万美元。
3. 3. The average life expectancy for peopleborn in the 1950s is 82 years old.
   1950年代出生的人的平均预期寿命为82岁。