2 sentences

1. 干冰不是冰，而是二氧化碳的固体形式。

   gān​bīng bù​shì bīng, ér​shì èr​yǎng​huà​tàn de gù​tǐ xíng​shì.

   Dry ice is not ice, but a solid form of carbon dioxide.

   Source: CCMatrix

2. 当干冰融化时，它就变成二氧化碳气体。

   dāng gān​bīng róng​huà shí, tā jiù biàn​chéng èr​yǎng​huà​tàn qì​tǐ.

   When dry ice melts, it turns into carbon dioxide gas.

   Source: CCMatrix