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.

Basic oxides react with acids to produce salt and water.

This area is affected by radioactive fallout from past nuclear tests.

His nature is very kind.

Detailed information is needed to understand the nature of that project.