He is my online friend, and we play online games every day.

This bacteria can be killed by heat.

This food has been heat-treated to kill bacteria.

He prayed fervently for his sick friend.

He prayed earnestly for his sick mother.

Walking on the hot sand is very difficult.

The shape of this root is very unique, isn't it?

In subtropical regions, the climate remains warm throughout the year.

The raise in the price of this product was larger than expected.

This store raises the price of vegetables every winter.