His music has a melancholic atmosphere.

The expiration date of this yogurt is tomorrow.

I strafed the enemy's position.

The enemy plane carried out a strafing on our position.

This compound has cyclohexadecane as its main component.

He is spending his last few months as a lame duck president.

This apartment has an automatic locking system.

The theory of metric spaces plays an important role in many areas of mathematics.

In this shop, it's always so quiet that you could hear a pin drop.

Recently, I've been feeling heavy-headed due to lack of sleep.