This rock contains a lot of silica.

The soil of this plantation is very fertile.

We are living in this world.

He is good at playing the ocarina.

Mr. Tsuchiya is my best friend.

This 'doragon' is a very rare type.

This medicine contains magnesia.

Zoo staff must clean up the animals' excrement every day.

I am thinking about what to make her birthday gift.

She felt the pathos of things when she saw the cherry blossoms falling.