What remains unclear is how far this can go before the government reacts to it as a threat.

VOA: special.2010.06.18

Currently,the best explanation for the loss of methane is that it chemically reacts with dust in the atmosphere.

VOA: special.2009.12.30

A lot of things happen as the body reacts to an injury like a broken bone.

VOA: special.2009.02.04

"It reacts with that region, it inactivates the virus and the virus never has a chance to enter the cells that it would otherwise infect."

VOA: special.2010.07.14

During saponification, an alkali base such as sodium hydroxide reacts with a fat.

VOA: special.2011.03.09

Stress is how your body reacts to physical, chemical,emotional or environmental influences.

VOA: special.2009.03.24

The hydrogen reacts with oxygen to produce electricity and water.

VOA: special.2009.09.07

It generally reacts to treatment.

VOA: special.2010.05.04

He definitely reacts to it, it sort of calms him down a little bit."

VOA: standard.2010.05.05

Recent polls give President Obama an approval rating of between 58 and 64 percent, and some experts believe that number could rise depending on how the public reacts at the end of his overseas trip next week.

VOA: standard.2009.04.03