This is a simple sentence.

He used the spittoon to dispose of his cigarette butts.

He chose a stable job, saying 'a bird in the hand is worth two in the bush.'

The SI system is a standard unit system used worldwide.

The International System of Units is a system of units commonly used worldwide.

His new car is a Mustang.

An imaginary unit is an important concept in mathematics.

An astronomical unit represents the average distance from the Earth to the Sun.

I always use binchotan charcoal when I grill meat.

He was painting a picture using red lead.