My uncle is a famous zoologist.

Various plants and animals inhabit this park.

In physics, momentum is defined as the product of the mass and velocity of an object.

He is preparing the props to use on stage.

Carrying the stage props of the theater company is a tough job.

Regular verbs are relatively easy to learn.

Learning irregular verbs is difficult.

I take the train from Suidobashi station every day.

Protozoans are single-celled organisms.

In behavioral sciences, the use of metatools plays a crucial role.