He is spending a lot of time on experimental research.

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.

He is known as an expert in subcritical nuclear experiments.

Before starting a new business, he said, 'Nothing ventured, nothing gained.'

He tried to work hard and study at the same time, and in the end, he experienced the lesson of 'He who chases two hares catches neither.'