Pilotless drones can help fill the gap.

无人机能有助于填补该空缺。

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The paper introduces the flight control system of the pilotless aircraft.

本文介绍“长空”超低空无人驾驶飞机的飞行控制系统。

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Pilotless planes require more people on the ground, are slow and vulnerable, and hungry for satellite bandwidth.

无人机不仅需要更多的地面人员，而且速度缓慢易受攻击，并且需要卫星带宽的支持。

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Mr Shrouder added however, that pilotless passenger flights are still far from becoming reality.

BBC: The Jetstream unmanned aircraft

It says the two leaders will agree on plans to build a new generation of pilotless "fighter drone" aircraft.

BBC: Papers

The WWF has also developed pilotless special drone aircraft to detect poachers, locate forest fires and detect illegal felling of trees.

BBC: Nepal's rhino hunters become the hunted