这个质子活动区的主要形态特点是前导大黑子A的半影纤维的顺时针旋涡结构。
The main morphological feature of this proton active region is the clockwise spiral structure of the penumbral filaments of the large preceding spot "A".
这个质子活动区的主要形态特点是前导大黑子A的半影纤维的顺时针旋涡结构。
The main morphological feature of this proton active region is the clockwise spiral structure of the penumbral filaments of the large preceding spot "A".
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