Tsuyoshi is my best friend.

He is a very strong person.

His strength comes from his mental power.

Sō is my best friend.

He is a person with a strong heart.

He approached the negotiation with confidence.

There are still many challenges left to put this technology into practical use.

This technology has not yet been made practical or useful.

This app has high practical use.

This store sells various daily or domestic articles.