The flow of the Wei River is quiet and beautiful.

There is a lot of spirogyra floating in this pond.

In this chemical reaction, hydration plays an important role.

This area is rich in subterranean rivers, which serve as a source of groundwater.

The Indo-European languages are some of the most widely spoken in the world.

I found a house mouse in the house.

My pet silk mouse, a rare term for hamster, is very cute.

The vaquita is an endangered species and one of the rarest marine mammals in the world.

The naked mole rat is a very unique creature.

He was my student, but now he has become so proficient that it can be said 'the student has surpassed his teacher.'