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

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。

youdao

Labor education, also called education on the hardworking spirit, ranges from housework to school labor and community voluntary services.

劳动教育，又称勤劳精神教育，包括家务劳动、学校劳动、社区志愿服务等。

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Students from a middle school, experience farming during their labor course.

一所中学的学生在他们的劳动课程中体验干农活。

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The Labor Department says even among high school graduates, twenty-one percent of those with no college were jobless.

VOA: special.2009.08.20

"It's been a very, very serious and critical situation, " said John David, a West Virginia University Institute of Technology professor and volunteer with the South Appalachian Labor School who has been working in Fayette County.

CNN: July 7, 2012 -- Updated 0222 GMT (1022 HKT)

Today, less than 10% of the native-born men in the labor force are high school dropouts.

CNN: Key to immigration reform: Worker visas

In 1960, half of the native-born men in the labor force were high school dropouts happy to do physically demanding, low-skilled work.

CNN: Key to immigration reform: Worker visas