This chemical reaction is very dangerous.

Fundamental knowledge of mathematics is necessary for daily life.

The success of this project is a combination of many components.

This reaction occurs through a chemical process.

This factory strictly controls the emission of hydrogen sulphide.

It is important to learn the basic grammar of Japanese.

This chemical reaction is very dangerous.

This chemical reacts when heat is added.

He is majoring in chemistry at university.

He sued the company for misconduct.