It is usually much better to prevent a problem from happening than it is to find ways to solve it.

VOA: special.2009.08.30

To prevent this from happening, levodopa can be combined with other substances, like carbidopa.

VOA: special.2009.04.07

Vaccination is a life or death question for poor people and if you can vaccinate a child to prevent a disease from happening it is a lot more cost effective than it is to treat that disease afterwards."

VOA: special.2010.03.29

Their goal: to find ways to fix the economic crisis and to prevent it from happening again.

VOA: standard.2009.03.31

"And I urge Congress to continue moving forward on financial reform that will help prevent the crisis we saw last fall from happening again."

VOA: standard.2009.10.22

Israeli analyst Ra'anan Gissin. "The strategic thinking has to be, first of all, to have sufficient intelligence but also the right intelligence, so that we can forestall, so that we can prevent this from happening right from the beginning."

VOA: standard.2010.07.12