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

Better working conditions. One of its first demands was an eight-hour work day.

VOA: special.2010.05.06

The driver tried for a speed of about eight kilometers an hour.

VOA: special.2010.04.26

But it is really traveling at twenty-eight thousand kilometers an hour.

VOA: special.2009.09.30

One hundred forty-eight tornadoes struck during a twenty-four-hour period.

VOA: special.2010.05.11

They were moving at twenty-eight thousand kilometers an hour.

VOA: special.2009.07.01

His space flight lasted one hour and forty-eight minutes.

VOA: special.2009.06.17

His speed was twenty-eight thousand kilometers an hour.

VOA: special.2009.06.17