Kiyasu is my best friend.

Tomoki is my best friend.

I have been to Keelung City in Taiwan.

He is suffering from combat stress reaction.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.

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

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

No chemical flavoring is used in this ramen at all.

My company specializes in the manufacture of fine chemicals.

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