But in a published commentary on the research,Simon Fisher, a speech and language researcher at the Wellcome Trust Center for Human Genetics at Oxford University cautions that before researchers can develop a drug therapy for stuttering,they will need to learn much more about the precise biochemical mechanism of the disorder.

VOA: standard.2010.02.11

They are even more surprised when they learn how much they can see during the day.

VOA: special.2009.10.27

It will attempt to learn how much water is in Jupiter's atmosphere.

VOA: special.2011.03.29

Sometimes it is surprising to learn how much oil the seeds contain.

VOA: special.2009.09.29

Now creditors will learn who gets repaid and how much.

VOA: special.2009.06.05

But it's a very,very rare dinosaur,". Though dinosaur researchers have made giant strides in recent years,they know they have much more to learn.

VOA: standard.2009.12.08