He brought me an old map.

He showed me his new toy.

That idea is just right, exactly what we needed.

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.

We exist as a part of the material world.

He is always the type of person who says this when that is said.

This painting is very valuable.