彗星

guān cè huì xīng

观测彗星

observe the comet

yǔ zhòu zhōng de yī kē huì xīng

宇宙中的一颗彗星

a comet in the universe

zhè kē huì xīng de guǐ dào yǔ dì qiú de guǐ dào jiāo chā

这颗彗星的轨道与地球的轨道交叉。

The orbit of this comet intersects the orbit of the Earth.

wǒ men bù néng wán quán kěn dìng huì xīng bù huì yǔ dì qiú xiāng zhuàng

我们不能完全肯定彗星不会与地球相撞。

We were not altogether sure that the comet would miss the earth.