An actor who worked with Katharine Hepburn once said that she brought with her an extra level of reality.

VOA: special.2009.09.20

He says every extra hour of television meant an eight percent increase in the chances of developing signs of depression.

VOA: special.2009.03.10

But some people are born with an extra copy of the twenty-first chromosome.

VOA: special.2009.09.09

"Essentially,The Particle Adventure is an interactive tour of the world of quarks, neutrinos,antimatter, extra dimensions,dark matter, Higgs boson, as well as accelerators and particle detectors."

VOA: standard.2010.03.05

Besides sponsoring the Family Home in Vancouver, P&G decided to take an extra step, launching a campaign to provide special monetary support for mothers of U.S.athletes.

VOA: standard.2010.02.20

New York City tacks on an extra levy of $1.50.

VOA: standard.2010.08.11

On the military side, the Chairman of the Senate Armed Services Committee, Democrat Carl Levin, says the plan calls for an extra 4,000 US trainers to work with the Afghan armed forces.

VOA: standard.2009.03.26

They look like an extra-large version of the World War Two jeep, but enclosed, with small blast-proof windows, a protected machine gun position on top and a variety of high-tech gear inside and out.

VOA: standard.2009.11.02