periodical change造句怎么写

4、The work roll bending on five stands are adjusted based on the periodical change of work roll shift position to decouple the coupling between edge drop and flatness control and obtain the optimum flatness control.

2、Result: Number of the vacant bed, the occupancy ratio of the bed, average inpatient day have the periodical change, one week is a cycle.

1、The spatial distribution of monthly precipitation in a year performance for the obvious periodical change characteristics.

3、He has gone through periodical changes