He is good at fastening his tie.

I eat breakfast every day.

A quark is a type of elementary particle.

Down quarks play an important role in particle physics.

The character '喰' means to eat.

The cat is scratching its back.

Insects of the Dermaptera order have a distinctive tail shape.

He behaved as if possessed by a demon.

He is living a life of shabby clothes and plain food.

Alkali metals are highly reactive chemically.