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Eurocopter believes its design could give a helicopter around 50% more speed and range, and not at a huge cost.

欧直公司认为它的设计能够使直升机增加约50%的飞行速度和飞行里程，而且并不用付出多大代价。

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The speed of the Earth around the Sun is about 30 times the speed of the Moon around the Earth.

地球绕行太阳的速度大约是月球绕地球的30倍。

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I have shown you yesterday that the speed of the particle as it goes around the circle is this .

我昨天讲过,质点做圆周运动的速率等于这个

耶鲁公开课 - 基础物理课程节选

For a player whose game centers so much around speed, it could be a rapid decline once he loses a step.

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Once the light enters the ruby, its speed is slowed down to around the speed of sound (approximately 741mph) and the spinning motion of the rod drags the light with it, resulting in the image being rotated by almost five degrees: large enough to see with the naked eye.

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The slow dimension makes time drag while leaving you free to speed around.

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