If you take a pebble with a radius of about one centimeter and you throw it off a high building, it will reach a speed which will not exceed 75 miles per hour because of the air drag.

如果拿一个半径是，1厘米的小卵石，从高楼上扔下去，它的速度因为空气阻力，不过超过每小时75英里。

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The vehicle must take off and land at an airport; once in the air, it can range 460 miles at a speed of 110 miles per hour.

这款飞行汽车必须在机场起飞和降落；一旦升空，它可以以110迈的速度最多飞行460英里。

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Although South Africa managed to dismiss Ponting and David Hussey - caught by a brilliant take at full stretch from Duminy running backwards at full speed at deep mid-off - the tourists bowled too full as White and Hussey took advantage.

BBC: White & Hussey guide Aussies home

Broadband, which allows high-speed information exchange over a phone line, has yet to take off in great numbers in Europe.

BBC: The Xbox