Mr. Uezono is my best friend.

Ueda is my best friend.

Therefore, I apologized to him.

The underground water in this area is very clean and is used as drinking water.

I think that plan is completely useless.

You can participate in this event free of charge.

Lambda functions are very useful in programming.

This painting is untitled.

His life is very monotonous.

Her life always encourages people.