The discovery that the division of labor is more productive than isolated labor was the happy accident that made social cooperation social institutions, and civilization possible.
劳动分工比不分工的生产率更高，这个令人欣喜的偶然发现使得社会合作、社会机构及文明的出现成为可能。
2
Out of our expectation, when we reported the accident to the Labor Department, an official of the Occupational Safety Action Section came to our factory to inspect.
The part-timer industrial injury accident responsibility is not only one of important questions in the labor insurance, but also a special practice question in the tort law.