He raised a loud song to express his joy.

This material hardens at high temperatures.

This substance hardens when it cools.

This necklace is very expensive.

This process is called gelatinization and is used in the preparation of various foods.

This liquid will gelatinize when it cools.

Smoking is prohibited on the premises.

Kota is my best friend.

He is indeed a person like a noble man.

He sneaked into the school through the back gate.