By the time of her death in nineteen twelve, she had begun a revolution that led to the right of women to do responsible work for society.

VOA: special.2009.07.26

By the time of his election, most white adult males could vote.

VOA: special.2009.01.19

By the time he returned to England in October of eighteen thirty-six, he was already a well known geologist and naturalist.

VOA: special.2009.02.25

By the time John Henry was a young man, he was one of the best steel-drivers in the country.

VOA: special.2009.02.21

They had to do this by firing the lunar module rocket engine for just the right amount of time.

VOA: special.2009.07.22

The study found that those who received lower doses of steroids by mouth spent less time in the hospital.

VOA: special.2010.06.23

As a boy,Carl said he knew if it was time to go to school by the sound of a train.

VOA: special.2009.11.01

He died last year. By that time, hundreds of thousands of the filters were in use in developing countries.

VOA: special.2009.06.22

The researchers also found tools used by the Clovis culture, a group of human beings who lived at that time.

VOA: special.2009.01.20

In fact,much of what historians know about the president's time at the house is from stories told by those soldiers.

VOA: special.2010.05.10

The members of the quartet had become major stars by the time they returned to the United States.

VOA: special.2009.03.01

Archeologists are able to estimate the age of these objects by dividing layers of dirt into time periods.

VOA: special.2009.08.18

And,they can discover the time of death to see if it matches information given by suspects and witnesses.

VOA: special.2010.05.05

By the time John was 30 years old, he had become one of the leaders of his town.

VOA: special.2010.06.26