In this chemical reaction, the catalyst promotes activation.

He chose tiles to make the roof of the house.

This ancient document contains the word 'father sound', which is no longer used in modern Japanese.

His leg is swollen.

I bought a new bag.

He emphasized obedience to the rules.

He learned to be obedient to his parents.

She is wearing a sailor uniform at school.

This teaching material was created for the purpose of review.

Fukuzo is my best friend.