Japan is located in the temperate zone.

He supports moderate policies.

He returned the favor because I had helped him before.

He returned the favor because I had helped him before.

I use warm water to make coffee.

He is an expert in acoustics.

Axion is a hypothetical subatomic particle and is considered a candidate for dark matter.

He is my benefactor, he helped me in my difficult times.

His mild personality attracts people quickly.

Where did this sound source come from?