He is doing a special exercise to strengthen his inferior rectus muscle.

He is doing special exercises to strengthen his depressor muscle.

The inferior gemellus muscle is a part of the human body, mainly supporting the movement from the waist to the leg.

He is doing a special exercise to strengthen the subclavius muscle.

He collapsed due to a subarachnoid hemorrhage.

Infrared astronomy plays a very important role in the study of the universe.

He didn't know the meaning of 'hanai chimonme'.

He is world-famous as an astronomer.

This 'hanaichimonme' is very beautiful, isn't it?

Radio astronomy plays a very important role in understanding the universe.