The atmosphere is about twenty-percent oxygen and eighty percent nitrogen from Earth's surface to where space begins at one-hundred-twenty kilometers up.

VOA: special.2011.04.06

Tim Geithner says the government is prepared with up to one trillion dollars to rebuild the market for loan-based securities.

VOA: special.2009.02.13

When it is cold outside, the president and his family can warm up near one of the White House's twenty-eight fireplaces.

VOA: special.2009.05.08

Rick Sharga from RealtyTrac says up to one-fourth of all homes that still have a mortgage loan balance are in this situation.

VOA: special.2011.01.24

In one study,infected mothers began to take three anti-H.I.V.drugs while breastfeeding for up to six months.

VOA: special.2009.07.29

"Rhonda Smith of Tennessee described how in two thousand six her Toyota-made Lexus sped up for a time to one hundred sixty kilometers an hour.

VOA: special.2010.02.26

The World Bank and two European development banks agreed last week to provide up to thirty-one billion dollars in aid to central and eastern Europe.

VOA: special.2009.03.06

He grew up on a farm. He began his education in a one-room country schoolhouse.

VOA: special.2009.11.10

Stock prices took a roller-coaster ride this week -- down one day,up the next.

VOA: special.2009.08.21

As a matter of fact, one of the major contributors to tuberculosis going up in several countries is because diabetes is going up -- and obesity.

VOA: special.2011.05.11

She went to the rainbow-colored trees and looked up at one of them.

VOA: special.2009.07.25

It can grow up to four meters tall. With about one and one-half meters of rainfall each year, plants and trees never stop growing in the Everglades.

VOA: special.2009.06.30

Euro-area nations have set up a bailout fund of about one trillion dollars.

VOA: special.2010.12.31

Police picked him up in Northern California in nineteen thirty-one.

VOA: special.2010.04.14