If you plant this seed, beautiful flowers will bloom.

Ketopentose is a type of monosaccharide with five carbon atoms.

He participated in the Olympics as a pentathlon athlete.

Carbon is one of the basic elements of life.

He was holding my hand tightly.

He was running while holding a bag.

He always carries an umbrella around.

Carbon monoxide is a colorless, odorless gas, and it is dangerous to inhale.

This problem is simply a matter of not having enough time.

Understanding the structure of atoms is a fundamental part of physics.