asteroid

Astronomers have detected an asteroid not far from Earth, moving in the same orbit around the Sun..天文学家在距离地球不远处发现一颗与地球绕日轨道相同的小行星。

Look at the movies that we see all the time. It's easy to imagine the end of the world. An asteroid destroying all life and so on..瞧瞧那些我们一直在看的电影，要想像世界末日那是很容易的事，比如一个小行星毁灭了所有生命之类的。

Moving on through the asteroid belt we enter the realms of the gas giant planets: Jupiter, Saturn, Uranus and Neptune, all of which dwarf the Earth..穿过小行星带继续前进，我们进入了气体巨行星区域：木星、土星、天王星、海王星，所有这些都使地球看起来像个侏儒。

asteroid belt,小行星带