Your body's natural defense system needs to be at its strongest to protect you against disease.

VOA: special.2009.04.29

It lets you observe and control your oxygen system.

VOA: special.2011.04.06

Does your country use a board examination system?

VOA: special.2010.02.25

"There are so many unintended circumstances when you try and 'gerrymander' the economic system to try and meet your political objectives.

VOA: standard.2010.01.12

"I need your help,doctors, because to most Americans, you are the health care system,"

VOA: standard.2009.06.15

"It is about time that we bring these criminals to justice, and your decision shows the world that this country stands firmly behind its legal system and the Constitution."

VOA: standard.2009.11.25

"As a result." "you may be foolish not to have a solar system or wind farm in your neighborhood, because that property is sitting there not making money for your neighborhood."

VOA: standard.2010.03.23