An analysis of four studies found no difference in short-term survival when rescuers followed current guidelines.

VOA: special.2010.09.15

Four, short, short, short, long.

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耶鲁公开课 - 聆听音乐课程节选

There are four kinds of echidnas: three species are long-nosed, while another has a short nose.

VOA: special.2009.07.07

Four years later at the Turin Olympics, Ohno won three short track speed skating medals, a gold in the 500 meters, and bronze in the 1,000 meters and 5,000-meter relay.

VOA: standard.2010.02.23

But this was less than one percent short of the two-thirds majority the ANC had campaigned for and four percentage points less than it won in elections five years ago.

VOA: standard.2009.04.25

His research shows that those taking the medications for more than four years have a higher risk of a fracture than people taking the drugs for a short period of time.

VOA: standard.2010.03.14