I withdrew from that club.

This building is made of fire-resistant materials.

Mr. Taira is my best friend.

Strong interaction is one of the four fundamental forces in particle physics.

Fundamental interaction is one of the most important forces in physics.

Gravitational interaction creates attraction between objects.

Electromagnetic interaction is one of the fundamental forces used to explain the force between substances.

Weak interaction is one of the four fundamental forces between elementary particles.

Aspergillus is an indispensable microorganism in the production of traditional Japanese food.

He changed his clothes immediately after exercising at the gym.