The theory of harmonic oscillators is a fundamental concept in physics.

This rubber is free to expand and contract, and can be changed into any shape.

He overcame hardship and achieved success.

Our lives have changed significantly due to the new coronavirus.

Gestalt psychology is an important means to understand human cognitive processes.

He lost consciousness due to the effects of nerve gas.

He likes to go to haunted places.

He believes in psychic phenomena.

He told me the truth.

Makimoto is my best friend.