This apartment has an automatic locking system.

The theory of metric spaces plays an important role in many areas of mathematics.

In this shop, it's always so quiet that you could hear a pin drop.

He is a nostalgiafag, always longing for the good old days.

He is doing a special exercise to strengthen his omohyoid muscle.

The mylohyoid muscle plays an important role in opening the mouth.

The levator costae is one of the muscles that lift the ribs.

The geniohyoid muscle is a muscle located under the jaw.

The sternothyroid muscle is part of the neck muscles, connecting the sternum and the thyroid.

Nonogram is one of the brain training games.