I am majoring in biochemistry at university.

I am majoring in inorganic chemistry at university.

My major is chemical engineering.

Analytical chemistry is a science that reveals the composition and structure of substances.

I am majoring in physical chemistry at university.

Chemical pollution has a serious impact on the health of the Earth.

He is spending a lot of time on experimental research.

Zoo staff must clean up the animals' excrement every day.

I am thinking about what to make her birthday gift.

She felt the pathos of things when she saw the cherry blossoms falling.