He is an expert in aerodynamics.

By doing wall squats for 10 minutes every day, you can improve your leg strength.

He is a person who can't read the room, so he struggles to match the atmosphere of the place.

The emotional atmosphere of this room is very calming.

Infrasound is a type of sound that is inaudible to the human ear.

Kunminjōon is a book for teaching the correct pronunciation of Hangul.

He is writing a thesis on abiogenesis.

I am majoring in developmental biology at university.

Understanding the concept of 'Ha-line conversion sounds' is important in learning Japanese.

There is a new air purifier in my room.