Mammals can maintain a constant body temperature.

Mammals can maintain a constant body temperature.

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

Mothers in the lactation period should strive for a well-balanced diet.

He thinks that war is a necessary evil.

He put the empty bottle in the recycling bin.

He opened the vial and took out one of the pills inside.

Mr. Nihon is my best friend.