The problem may last a few seconds, but it can get worse and worse with age, leading to a heart attack or stroke.

VOA: special.2010.03.02

Adding to the problem,scientists say, was an already reduced population, resulting from poor conditions last summer.

VOA: special.2010.04.27

Last Friday,however,the State Department said it was cancelling the results because of a computer problem.

VOA: special.2011.05.20

Last week, we discussed one problem for medical journals: the question of authorship.

VOA: special.2009.10.08

It says it fixed the brake problem last month.

VOA: special.2010.02.05

But he says Ireland is not the last obstacle. He says another big problem is that the president of Czech Republic Vaclav Klaus has also not signed.

VOA: standard.2009.10.02