1.The hardest work was assigned to the strongest laborers.
繁的作分配给强壮的劳。
2.Laborers were trained to handle 50-ton compactors and giant cranes.
人们受操作五十吨压土和巨型的训练。
3.A laborer takes a rest on a cinder dumpsite in Changzhi, China.
在中国长治,一名人在煤渣垃圾场酣睡。
4.Subject of labor is practice object subsystem, laborer is subsystem of practice main body, labor tool is practice neutretto system, productivity is the integral function that carries out a system.