Mr. Ukitada is my best friend.

Aiko is my best friend.

He goes to the gym every day to train his quadriceps.

Visceral muscles are muscles that move the internal organs of the body.

Child marriage is a social phenomenon that is a problem all over the world.

He trains his biceps at the gym every day.

He hesitated, unable to make a decision.

He hesitated and couldn't make a decision.

In statistics, the concept of autocorrelation is very important.

The crawling baby is playing in the living room.