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?

He is playing a new game online.

It's high temperature today, it's hard to go out.

Phonetic collocation indicates the combination of sounds of words.

Taking a warm bath is the best on a cold day.

After a long day, enjoying a warm bath is the best.