Labor refers to mental labor and labor refers to manual labor.
Source of labor:
"On Mencius and Teng Wengong" said: "Or toil, or toil; Those who work hard rule the people. Labor dominator; Rule by man is cannibalism, and the meaning of the world is universal. "
Meaning: some people use their brains, others work hard; People who use their brains are in charge, and those who work hard are in charge; People in power support others, and people in power support others. This is a universal truth. It is correct to point out that there is a division of labor between mental and physical labor in society. However, the expression of the relationship between the two is relatively simple and biased.
Synonymous with hard work: hard work, hard work.
The antonym of hard work: careless, absent-minded, absent-minded, indifferent and careless.