Bio-markers help researchers know what is happening in the bodies of people with a disease or medical condition.

VOA: special.2011.08.02

It's a hopeless situation for them,". "They expect us to provide them with help,which is of course, what we want to do.

VOA: standard.2010.01.14

General Jacoby says the Iraqi and Kurdish forces have begun to put aside political differences and, with American help, start to build what he called "a security architecture."

VOA: standard.2009.12.12

It is not clear what it will be able to do to help revive energy talks with Uzbekistan, Kazakhstan and Turkmenistan, During negotiations in the Czech capital,Prague, the three natural-gas producing nations were not convinced by E.U.offers of more trade and stronger transport links in exchange for their participation in a multi-billion-dollar gas pipeline, known as Nabucco.

VOA: standard.2009.05.11