Top walkers reach speeds of up to 15 kilometers per hour.

高水平的竞走运动员每小时时速可达15公里。

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In a long drop, they reach speeds of 60 miles an hour and more.

在一个长长的跌落过程中，它们可以达到每小时60英里甚至更快的速度。

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They can reach speeds of up to 25mph and would travel along their own narrow road system.

它们的时速可达25英里，而且会沿着其自己的狭长道路系统行使。

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With specially cooled tracks and racing equipment, it is not unusual for luge athletes to reach speeds of one hundred forty kilometers an hour or more.

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The most severe tornadoes can reach wind speeds of three hundred twenty kilometers an hour or more.

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It would reach hypersonic speeds -- five times the speed of sound.

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And they can be guided by GPS and reach speeds of 100mph.

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On this stretch--two lanes wide and almost completely straight for its entire 39-mile length--the fastest drivers routinely reach speeds of 87 to 90 miles per hour.

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The concept is simple: the cheese is rolled down a hill and runners attempt to catch it, which is no mean feat as the wheel can reach speeds of up to 70mph.

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