auroral spectrum

例句：

1. 1. The aurora borealis is visible from the Arctic region.
   北极光可以从北极地区看到。
2. 2. Auroral displays are fascinating to observe during the Northern Lights season.
   在北半球的极光季节，观测极光令人着迷。
3. 3. The auroral display was so bright that it illuminated the entire sky.
   极光如此明亮以至于照亮了整个天空。