This building is equipped with lightning protection, so there is no need to worry about being struck by lightning.

He avoided standing under the tree to avoid striking lightning.

This mural is painted with a traditional Chinese S-shaped geometric pattern, known as a thunder pattern.

This reaction occurs through a chemical process.

He is an excellent chemist who made many discoveries.

He is an expert in petrochemistry.

It's difficult to decipher this chemical equation.

Understanding chemical equations is difficult.

He is an expert in chemical analysis.

We are growing vegetables without using chemical fertilizers.