He is using that coat from winter to spring.

She is an expert in interior decoration.

You need to use your head to solve this problem.

He is an expert in oceanography.

My major is oceanography.

Marine pollution is a global issue, and all countries should cooperate to find a solution.

His hobby is collecting curios.

I buy foodstuff at the supermarket every week.

Microorganisms are one of the basic forms of life.

Protists are single-celled organisms that live in water.