According to the museum, this X-45 carried out 40 sorties, and became the first autonomous flight of a high-performance, combat UAV.

据博物馆，这种X - 45进行了40架次，成为第一个高性能的自主飞行，作战无人机。

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According to the museum, this X-45 carried out 40 sorties, and became the first autonomous flight of a high-performance, combat UAV. The program lasted until 2005.

据博物馆，这种X - 45进行了40架次，成为第一个高性能的自主飞行，作战无人机。该计划持续到2005年。

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The Reaper was flying a combat mission when operators lost "positive control" of the UAV, or the ability to establish connections and send control inputs to the remote-controlled aircraft.

“收获者”执行飞行作战任务时，导航员既失去了对无人机的“实际控制”，也不能与遥控飞机建立联系并发送控制输入信号。

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The new document, which updates joint air operations doctrine published in 2003, says that when data links fail in combat it can be tough to get a UAV back to its base.

新的文件，能够更新在2003年出版的联合空中作战理论，该文件称，当数据链路在战斗中失败，那么可以很难使无人机返回基地。

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The new document, which updates joint air operations doctrine published in 2003, says that when data links fail in combat it can be tough to get a UAV back to its base.

新的文件，能够更新在2003年出版的联合空中作战理论，该文件称，当数据链路在战斗中失败，那么可以很难使无人机返回基地。

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