糖放在水里很快就化了。

Táng fàng zài shuǐ lǐ hěn kuài jiù huà le.

Sugar dissolves quickly when put in water.

天气太热，冰淇淋都化了。

Tiānqì tài rè, bīngqílín dōu huà le.

The weather is so hot that the ice cream has melted.

冰化成了水，你要小心地走路。

Bīng huàchéng le shuǐ, nǐ yào xiǎoxīn de zǒulù.

The ice has turned into water, so you should walk carefully.