根据美国劳工部的统计，截止到2015年5月，登记在册的校车司机有505560人。

According to the U.S. Department of Labor, in May 2015 there were 505,560 registered school bus drivers.

youdao

根据美国劳工部的统计，截止到2015年5月，登记在册的校车司机有505560人。

According to the U.S. Department of Labor, in May 2015 there were 505,560 registered school bus drivers.

youdao