This product is of poor quality and not worth the price.

This material has very high plasticity.

We visited a town on the coast.

We have equipped everything necessary for the trip.

He participated in the anti-war movement.

He was my student, but now he has become so proficient that it can be said 'the student has surpassed his teacher.'

My great-grandfather was a leading painter in Japan when he was young.

Heavy hydrogen is one of the isotopes of hydrogen.

He has fundamental knowledge of mathematics.

Carbon monoxide is a colorless, odorless gas, and it is dangerous to inhale.