A "tornado outbreak" is often defined as six or more tornadoes produced by the same weather system within a day.

VOA: special.2010.05.11

One of his promises was to fight a fare increase on what was known as the M.T.A.subway system.

VOA: special.2010.01.25

She also works as a research investigator for the Veterans Administration Ann Arbor Healthcare System.

VOA: special.2010.06.01

Antarctica is governed by a collection of agreements known as the Antarctic Treaty System.

VOA: special.2009.06.03

" ...such as relatively low levels of malaria risk to start with, political stability, a good health system and low levels of population movement bringing in infections from elsewhere."

VOA: special.2010.11.03

But Ridding says the paper is working on a micropayments system which they expect to roll out as early as next year.

VOA: standard.2009.12.05

"As a critical part of this program, we are making it clear that we are willing to provide capital to the system,"

VOA: standard.2009.03.24

Moscow also sees the missile-defense system as the first step in a worldwide American missile-defense program.

VOA: standard.2009.07.15

He says the legal system to try crimes against humanity was flawed from the start, as it did not provide a mechanism to prosecute people living abroad.

VOA: standard.2009.09.07

Biden said the defense system comes as Europe faces a serious threat.

VOA: standard.2009.10.23

"I am committed to fixing our broken immigration system in a way that upholds our traditions as a nation of laws, but also as a nation of immigrants.

VOA: standard.2009.04.17

(Speaking in French) Aounit hopes the government call will prompt what he describes as a larger "de-ghettoization" of France's social system, which must also include equal access to jobs.

VOA: standard.2010.02.02

"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

"He was telling us, not only our family, but more and more the public, 'Don't use the ocean as a garbage can, as a universal sewer because it's a life support system.

VOA: standard.2010.06.18