In fact, this milestone was reached only 10 months after the systems reached 200,000 total flight hours, and 22 months after the first 100,000 flight hours were accumulated.

事实上，“影子”无人机系统在达到首个100,000飞行小时22个月后，200,000飞行小时仅10个月后就实现了上述里程碑。

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The turbo-prop, high-wing, versatile “Herc” has accumulated over 20 million flight hours. It is the preferred transport aircraft for many US Government services and over 60 foreign countries.

它采用的四发涡轮增压发动机、高单翼和尾部大型货仓设计使其已经累积飞行时间已经超过2000万小时，是美国和超过60个国家的首选运输机。

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An Airbus statement said the plane went into service in 1990 and had accumulated 51, 900 flight hours.

空中客车公司的声明中说，该飞机是在1990年投入使用，飞行时间已达51900小时。

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