This substance chemically transforms when heat is applied.

This chemical synthesis reaction is very complex.

He is an excellent pianist, besides, he is also an excellent composer.

He added sugar to his coffee.

What is this material made of?

He missed school because he had a fever.

He is heating up the coffee.

The heat is intense today, it's hard to go outside.

His passion for music is incredible.

He painted the sun into the landscape.