Asteroidea

例句：

1. 1. The asteroid was discovered by astronomers.
   天文学家发现了这颗小行星。
2. 2. Asteroidea are known to be hazardous to human life.
   小行星对人类生命构成威胁。
3. 3. The asteroid is expected to collide with Earth within the next few years.
   预计小行星将在不久的将来与地球相撞。