Laborers were trained to handle 50-ton compactors and giant cranes.
工人们接受操作五十吨压土机和巨型起重机
训练。
动者（laborer复数）Laborers were trained to handle 50-ton compactors and giant cranes.
工人们接受操作五十吨压土机和巨型起重机训练。
The hardest work was assigned to the strongest laborers.
最繁重工作分配给最
工。
A laborer takes a rest on a cinder dumpsite in Changzhi, China.
在中国长治，一
工人在煤渣垃圾场
。
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.
动对象是实践客体子系统,动者是实践主体子系统,动工具是实践中介子系统,生产力是实践系统整体功能。
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