The subject clauses in this book are well-written.

The subject of labor is an important aspect of economics.

The subject headings in the library catalog help users find relevant books.

Subject-matter is an important aspect of any discussion.

I watched a short subject at the film festival.

The short subjects were a hit at the film festival.

The subject matters discussed in the meeting were diverse.

The echo bounced off the walls.

The echoes subjects bounced off the canyon walls.

Subject-matters play a crucial role in academic research.