"It's still possible that in certain patients, measuring these biomarkers would be helpful.

VOA: special.2009.07.15

"Well, we know that it could be genetic. And we know that there are certain families where there is a high incidence of fibromyalgia in three generations.

VOA: special.2011.07.26

President Kennedy once said: "I am certain that after the dust of centuries has passed over our cities, we,too,will be remembered not for our victories or defeats in battle or politics, but for our contribution to the human spirit."

VOA: special.2010.10.29

They know it will come. They know that it will be of a certain level of quality."

VOA: standard.2009.08.31

And many students received warnings that they will be expelled from universities,and has sent hundreds of their basij and basij students to certain universities,".

VOA: standard.2009.12.07

It would be embarrassing,I think," . "I would be objecting to that because at a certain point security begins to get into your personal life,"

VOA: standard.2009.12.30

"Pakistan is absolutely certain that this war cannot be won by military force alone.

VOA: standard.2009.03.26

The Georgian spokesman says he cannot be 100 percent certain about Russia's involvement,but notes that an investigation of specific involvement of Russian special services is underway.

VOA: standard.2009.05.05

"But it is an important election in the sense that they need to be free,fair and non violent in order for Macedonia to qualify for certain EU accession membership qualifications."

VOA: standard.2009.03.22

"This change to a higher phase of alert is a signal to governments, to ministries of health and other ministries, to the pharmaceutical industry and the business community that certain actions should now be undertaken with increased urgency, and at an accelerated pace,"

VOA: standard.2009.04.29

They look at you as if you're phony. I also think as an actor, you want to be able to play many parts, and if you have so much surgery done that you could only look a certain way, you're limiting the parts you're going to play."

VOA: standard.2010.07.22