Now, the radioactive material is moving toward the Columbia River.

It rippled from one shade to another as the material moved.

The department believes radioactive material would move only slowly with the flow of water deep underground.

In general, the material on race has moved from surface traits to genetics and evolutionary history.

Therefore, oscillating material does not move far from its initial equilibrium position.

The library will close and its materials will move to a temporary building.

Most of the engineering space wasn't even filled with air; the material, components and machines could move faster that way.

Waiting - Waste occurs whenever materials are not moving through a process.

Inside the stem, materials move up and down the tissues of the transport system.

The thin material moved reluctantly as if made of lead.