He is an expert in orthoepy, teaching pronunciation.

This room is covered with soundproofing material, so the sound doesn't leak outside.

He honked the car horn to get my attention.

What is this pot used for?

He was swimming freely as if he was a fish playing in the pot.

Since he is always laughing, it can be said that 'fortune comes in by a merry gate'.

He spent his money as quickly as 'a duck comes bearing green onions', which means a fool and his money are soon parted.

He almost drowned in the pool.

He scooped up water with his hand and drank it.

Oligodendrocytes play a role in supporting the nerve cells of the central nervous system.