At best, one can outline a few key characteristics. 充其量你只能大致描绘出它的一些关键特征。
Another key feature of this remnant is the long white line running from left to right across the center called the equatorial belt. 该遗迹的另一关键特征是,赤道方向有一道明亮的白色环带,自左向右穿过穿过遗迹的中心,名为环赤道带。