Physics is a difficult subject.

This is my precious thing.

That's a new thing, isn't it?

He created a new story.

There are many things placed in my room.

There are a lot of old furniture in the storage room.

The air in this area is greatly affected by pollutants emitted from factories.

The existence of dark matter has not yet been fully proven.

Antibiotics don't work for colds, so please don't take them unnecessarily.

It is said that antimatter has properties opposite to those of matter.