1 sentence

1. 一些彗星在经过地球时肉眼可以看到。

   yī​xiē huì​xīng zài jīng​guò dì​qiú shí ròu​yǎn kě​yǐ kàn dào.

   Some comets can be seen with the naked eye as they pass by Earth.

   Source: CCMatrix