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At full speed,a cheetah (can run about 65 miles per
hour.Fastest horses can run
around 47 miles per hour.The
greyhound can run nearly 40 miles per hour.So what is it that al-
lows the cheetah to run so fast?A group of scientists decided to
compare the cheetah with the greyhound.Both animals employ a
running form known as the rotary gallop(旋转式疾驰).Closely
studying cheetahs in the wild is challenging.So they turned to a
zoo in England and one in South Africa.
Some of the English cheetahs were taken to the performance
lab and encouraged to chase a chicken along a 90-meter track
The researchers repeated the experiment with
trained racing
greyhounds,and then compared the two animals'pace and form.
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