Clots can block the flow of blood to the heart or brain and cause a heart attack or stroke.

VOA: special.2009.10.20

Like the Olympics, the World Cup provides a good reason to build roads, railways and airports to manage the flow of visitors.

VOA: special.2010.06.09

It provides a continuous flow of air into the throat and lungs while the person sleeps.

VOA: special.2011.05.04

A stroke is a loss of blood flow in the brain.

VOA: special.2009.09.22

But the flow of food aid is at a twenty-year low.

VOA: special.2009.09.22

The flow of illegal drugs and the violence associated with it is a concern throughout North America.

VOA: standard.2009.08.10

"We need a durable and successful flow of credit in our economy, but we cannot tolerate profits that depend upon misleading working families.

VOA: standard.2009.05.09

And until BP finds a way to stem the flow, no one can estimate the full effect of this disaster on BP, its shareholders,or employees.

VOA: standard.2010.06.18

House of Representatives as early as Friday, the unusual multi-year plan is aimed assuring a dependable flow of Washington support to the economically hard-pressed Pakistani government.

VOA: standard.2009.09.24

Across the border in Mexico, the quiet town of Naco receives a steady flow of border crossers who have been arrested and deported from the U.S.side.

VOA: standard.2010.06.07

The Okefenokee seems primeval. It was formed when waters from an ancient ocean receded and a mammoth sandbar blocked most of the water flow to the sea.

VOA: standard.2010.03.29

It's usually a combination of temperature,even air flow.

VOA: standard.2010.05.05

He expressed reluctance to comment on American domestic affairs, but suggested that a renewal of the now-expired U.S.ban on assault weapons would be helpful in curbing the flow of high-powered armaments to Mexican drug cartels.

VOA: standard.2009.04.12

And Presidents Barack Obama and Felipe Calderon have pledged cooperation on a wide range of issues - especially border security aimed at battling drug and gun trafficking, and the flow of illegal immigrants into the United States.

VOA: standard.2010.05.17

A UNHCR official based in South Sudan confirmed to VOA that it had started receiving a steady flow of refugees from the Central African Republic, adding to the large number of Congolese refugees who were displaced by the group.

VOA: standard.2009.08.27

When rain and melting snows flow over a city's streets, parking lots and sidewalks, that runoff picks up all kinds of pollutants residues of petroleum and pesticides, soaps and solvents, as well as pet and wildlife waste.

VOA: standard.2010.08.04