He is a new trainee.

His belief is firm.

Kyoko is my best friend.

His belief was firm, and no one could shake it.

We are sharing ownership of this project.

This car is our family's joint possession.

An earthquake occurred, and the strong shaking shook the entire house.

We will co-sponsor this event with the city.

We are participating in local mutual aid activities.

Humans and nature should coexist.