According to the U.S. Departmentof 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。
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The Education Departmentof China has announced that schools should ban students from carrying mobile phones during school hours.
中国教育部宣布，学校应该禁止学生在上课时间携带手机。
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Rong Sheng from the school's safety department said, "In the past, our school safety guards had to stand in the middle of the road after school to stop the cars."