... 双极（黑子）群 bipolar group 双极磁区 bipolar magnetic region 双极黑子 bipolar sunspot ...
2
?双极扇区
... 双极[黑子]群 bipolar group 双极扇区bipolar magnetic region 双极星云 bipolar nebula ...
双语例句
1
An active region with a bipolar sunspot is formed when the magnetic flux ring of the sunspot rise to the solar surface from the depth of solar convection zone.