较差自转 meaning in English

differential rotation

Do you know how to detect the differential rotation in our sun
你可知道如何证实较差自转？
We believe that sunspots and many other solar activities are due to this differential rotation
我们相信太阳黑子和不少太阳的活动，皆是由较差自转所造成的。
One reason is the change of interior convection zone with spectral type produce the phenomena ; another reason is the differential rotation of f type stars exist a upper limit
这一拐点的出现可能是f型主序星的对流区的变化影响形成的，也可能是f型主序星在f5附近存在较差自转的上限形成的。