laborers

A laborer takes a rest on a cinder dumpsite in Changzhi, China.

在中国长治，一名工人在煤渣垃圾场酣睡。

The hardest work was assigned to the strongest laborers.

最繁重工作分配给最强壮劳工。

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.

劳动对象实践客体子系统,劳动者实践主体子系统,劳动工具实践中介子系统,生产力实践系统整体。