As strong if subtle agents for change, "viruses seem to have been important forces in evolution," he says.

It is a strong oxidizing agent and can start fires.

"But you're going to be left with a core of really strong agents who are going to provide real value to customers."

It is a very strong oxidising agent when used with acid and water.

Pull in a female agent strong enough to work the part, I'll work with her.

Today strong agents, through the stars they represent, are playing a more prominent part in the negotiation.

Materials in this group range from slight to strong oxidizing agents.

A17 A chemical was found to be a strong anti-cancer agent.

Agent 4 is a strong black agent with a mean temper.

It is a strong oxidizing agent, being reduced to nitrogen.