The superior pharyngeal constrictor plays a role in pushing food into the esophagus when swallowing.

The middle pharyngeal constrictor is an important muscle that helps with swallowing.

The concept of chemical equivalent is essential for understanding chemical reactions.

My company specializes in the manufacture of fine chemicals.

Chemotransmitters play an important role in the transmission of information between nerve cells.

Stoichiometry is a method for calculating the amount of substances in a chemical reaction.

No chemical flavoring is used in this ramen at all.

The mountains look beautiful at dawn.

He is devoting all his energy to that work.

A beautiful gem is set in her ring.