The short wave signals bounce off the ionosphere that surrounds the Earth,back to the ground and then back to the ionosphere.

VOA: special.2010.12.08

The group says less time passes for an earthquake shock wave to reach a measuring instrument than in the past.

VOA: special.2009.03.17

As each wave came, the boat rose and fell, like a horse starting toward a fence too high to jump.

VOA: special.2010.03.06

Then,as the boat was carried to the top of a great wave, the captain looked across the water.

VOA: special.2010.03.06

Potato shortages caused at least one million deaths and a wave of Irish immigration to America.

VOA: special.2009.10.20

But it is difficult to read and judge a wave when it is near.

VOA: special.2009.03.17

"Now these initiatives comprise a first wave of programs to promote global entrepreneurship.

VOA: special.2010.05.10

The problem was that after successfully floating over one wave you find that there is another one behind it just as strong and ready to flood your boat.

VOA: special.2011.04.09

Is there going to be a new wave of assassinations, under the pretext that there is no security in the country?

VOA: standard.2009.04.30

We have continued to invest in innovators and entrepreneurs that want to unleash the next wave of clean energy.

VOA: standard.2010.04.25

Uno,zero,cinco,cinco,". Simmons says Cuba's intelligence agency still prefers short wave radios and face-to-face meetings over computers and more advanced technology.

VOA: standard.2009.06.06

A wave of cold and snowy weather continues to grip Europe, grounding airplanes,trains and cars and causing dozens of deaths.

VOA: standard.2010.01.10

But,it usually finds more susceptible populations to infect among the people who did not get the disease in the first wave.

VOA: standard.2009.09.04

The tariff has spurred a wave of anti-American Internet postings in China, with calls for Beijing to stop buying U.S.bonds.

VOA: standard.2009.09.14