halley's comet
comet tail
celestial bodies
orbital period
A: Have you ever seen comets through a telescope?
A：你曾经用望远镜看过彗星吗？
B: Yes, it was an incredible sight.
B：是的，那是一场不可思议的奇观。
1) 彗星（天文学术语）
2) 指代快速移动或突然出现的事物
1. 彗星
noun
1. Celestial bodies made of ice and dust that orbit the Sun.