The Global Hawk system has logged more than 28,500 total program flight hours, of which more than 21,500 hours were flown in support of the global war on terrorism.

全球鹰系统飞行已超过28500小时，其中21500小时是用于支援全球反恐战争。

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Qualification issues include design and testing required to maintain the combat capabilities of the UH-60 Black Hawk and the safe flight envelope of the aircraft with the tank.

该机的设计难点在于用户要求既要保持UH-60原有的攻击运输能力，又要在携带外部大型水箱的情况下保持飞行安全。

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There is that swing in the flight of a swallow, or of a hawk dashing down on its prey, or of a champion horse racing to the finish "in good form", as we say.

当一只燕子在飞翔的时候，或当一只鹰鸟由空疾降以扑掠食物的时候，或当一只骏马驰至终点而获得锦标的时候，那种韵律是很美丽的。

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"What we saw last week was not unlike the first flight of the Kitty Hawk, " said Friedland, Ivanhoe's cofounder and deputy chairman, in a conference call the next day.

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The Hawk-Eye system uses strategically-placed cameras to determine the exact flight of a ball and is already used in international cricket and at grand slam tennis tournaments.

CNN: Goal-line technology enters final testing