1. The average output of the factory is 20 cars a day.
    该工厂的平均产量是每天20辆汽车.

2. He developed 150 or so X-rays, his usual output, to celebrate.
    他以平日的工作量，冲洗大约150张X光胶片来庆祝这个日子。

3. Many European countries and the United States check vehicles for gas and smoke emissions to make sure the levels are below the permitted output.
    许多欧洲国家和美国都对机动车的烟气排放进行检测，以确保低于允许的排放量。