His hobby is collecting precious metals.

He is good at solving geometry problems.

He shot the enemy with a machine gun.

The structure of the speech organs greatly affects the pronunciation of language.

The human body is composed of many organs.

Mr. Iriki is my best friend.

You need wheat flour of low viscosity to make pancakes.

This region has been suffering from famine for a long time.

How long is the duration of this project?

I forgot to buy toothpaste.