During their six-week voyage, researchers will employ a range of techniques to unlock some of the secrets of the giant marine mammals.

VOA: standard.2010.01.05

Bernanke's strategy to boost the economy includes unconventional lending programs, to unlock credit and stabilize the financial markets.

VOA: standard.2009.08.25

As first the U.S.and then the world economy slipped into recession, several efforts to unlock credit have failed.

VOA: standard.2009.03.24

Riders use an electronic key to unlock a bike from one of more than 300 stations.

VOA: standard.2010.07.30