n. [天]小行星;海盘车;海星
adj. 星状的
网络 小游星; 海星; 流星
There is an asteroid on a collision course with the Earth.
有个小行星正处于可能与地球发生碰撞的航向上。
Scientists were debating whether an asteroid was about to hit the Earth.
科学家们在争论一颗小行星是否要撞上地球。
The largest asteroid is Ceres, which is about a quarter the size of the moon.
最大的小行星是谷神星,其体积大约是月球的四分之一。
In this case, the orbit of the rotating asteroid will very slowly spiral toward the sun.
在这种情况下,旋转小行星的轨道将非常缓慢地向太阳旋转。
An asteroid could have annihilated the USA—and I wouldn´t have heard the news for hours.
一颗小行星可能已经把美国毁灭了——而我可能几个小时内都没有听说这个消息。