He is an expert in electronics.

He is majoring in engineering.

I am majoring in electronics at university.

Demography is a branch of social science that studies the structure, distribution, and changes in human population.

This recipe requires a lot of ingredients.

He is a serious moralist, always valuing ethical behavior.

What is the famous product of this region?

He looked like a monster.

He chopped the tree into pieces and made firewood.

He chopped the tree into pieces to make firewood for the fireplace.