1 sentence

1. 为什么这些行星被称为气态巨行星和冰巨行星？

   wèi​shén​me zhè​xiē xíng​xīng bèi chēng​wéi qì​tài jù xíng​xīng hé bīng jù xíng​xīng?

   Why are these planets called gas giants and ice giants?

   Source: CCMatrix