Ask an English expert, can you help translate the following short paragraph of English? I hope that software translation is not the best logical rigor.

The labor force is constantly flowing from agricultural areas to industrialized areas. Internal migration is mainly a temporary phenomenon from rural to urban areas.

The number has increased greatly, from 26 million in 1988 to 260,000 in 2004. Most of them are circular migrants (called "floating population")

It is estimated that12 ~130,000 rural laborers will move to cities and towns every year in the next 20 years. These migrations are temporary at present, but they may become permanent. If you restrict yourself to living in cities, you will relax.

About 70% of immigrants are 16 to 35 years old. They leave middle school, move out between life stages, and then come back to get married and have children.