- Based on the method of rotation and movement matrices dividing region survey data was united into the same field, it was smoothed and integrated to the whole.
- Objective To investigate the clinical value and effect of high and divided region excision and ligation for primary varicose veins of lower extremity,so as to conclude surgical experience.
- dividing regions according to their types
- The dividing line is not always marked and clear.
- Most insect do not live in polar region.
- The earthquake may cause a region to fall in.