auroras

1. 极光：失落极光 (aurora)之谜某些时候在接近午夜时, 极光 (auroras)会突然停止,这种现象没有人知道是什麼原因. 极光会在地球的黑夜地区出现缺口,这种件事最近才被证实,是由华盛顿大学 (U. Washington)的 D.

1. danci.911cha.com

1. To scientists'surprise, the geomagnetic storm powering the auroras raced 400 miles in a minute across the sky.

2. Such a breach can cause brilliant auroras or disrupt satellite and ground communications.