Their songs gradually get better and better, So it turns out that lots of the behavior is fairly similar between speech learning and songbird learning."

VOA: standard.2010.04.05

The protesters plan to work their way north in vehicle convoys, gradually adding to their numbers as they move through cities and towns in the coming days.

VOA: standard.2009.03.12

"What we are seeing China is that wages are gradually converging to those levels in the U.S.and Europe, but this convergence is going to take a very long time."

VOA: standard.2010.06.24

The six nations reached an agreement in September 2005, creating a framework for gradually reducing the North's arsenal, while normalizing its relations with Japan,the United States, and South Korea.Since then,however, North Korea has conducted two nuclear weapons tests.

VOA: standard.2009.12.11

"As we train Afghan security forces to get them to take over the tasks and the responsibilities of Afghanistan, and I am saying what President Obama and the other leaders have said, then we will be able gradually to bring out forces home,"

VOA: standard.2009.11.04

"Because it's happening so quickly, they haven't had time to adapt and change, if you imagine a climate changing over hundreds of thousands of years, bears and other animals would gradually move into other habitats,but because this is going to happen over decades, it will be too fast for them to adapt and look for other food sources,"

VOA: standard.2009.12.13