Mizutsukasa is my best friend.

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.

He respected the man so much that he would drink his nail clippings if he could.

The failure of the project was due to a situation where too many cooks spoil the broth.

I have been to El Salvador.

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

He is the type of person who forgets the heat once it passes the throat.