Concrete is an important material for making different buildings and structures.

It is one of the most important materials for reconstructing the lost 14th-century original by the Chinese.

In this case, the piano line does have some important material, but it is woven right into the fabric of the music.

In order to effectively bring important material to light, these users may need an additional safety net.

"Don't ever get excited about important materials you find in these papers," he said.

The important material of a given era is often its defining point.

But much of the book's most important material, he wrote "still seems as foreign to general awareness as it was 30 years ago."

On the side for concern are the e-mails and the fact that she left some important materials behind.

Wood is still the most important material of local crafts.

He kept much important material at his home, and controlled access to it carefully.