In this experiment, we will use the International System of Units.

He is deeply involved in the study of the meridian system.

We use this coordinate system to locate the position of an object.

In physics, the inertial frame of reference is a very important concept.

This system is very complex.

He is an aggressive man in relationships, actively pursuing love.

He is interested in radio wave research.

He is a herbivore man, not interested in marriage or dating.

The Japanese imperial family line is said to have the longest history in the world.

My nervous system is affected by stress.