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 solved the problem in a scientific way.

He is good at tactical thinking.

He exercises every day and leads a healthy life.

Fundamental knowledge of mathematics is necessary to solve advanced problems.

She is looking for an ideal partner.

He has expert knowledge.

He is troubled by chronic headaches.

I think his ideas are revolutionary.