When he wears this sweater, he looks a bit fatter.

I sleep on a futon laid on the floor every night.

He likes to take a walk in the park at dusk.

He is an expert in ethology, and his research is highly regarded worldwide.

Cell biology is the study of the structure and function of cells, which are the basic units of life.

His father is a very strict person.

During the Yuan dynasty, Chinese culture developed greatly.

This is my original.

Understanding the original principle is important for solving problems.

The budget for this project has been reduced by 20%.