unmanned flight operation [航] 无人驾驶飞行器的活动
unmanned flight vehicle 无人驾驶飞行器
unmanned test flight 无人试飞
unmanned reconnaissance flight 无人驾驶侦察飞行
unmanned space flight unit 无人驾驶航天器
unmanned helicopter flight control system 无人直升机飞行控制系统
The answer is the Ares 1, which had its first unmanned flight on Oct. 28 and dazzled even the skeptics.
战神1号由此而生。战神1号已于10月28日进行了首次无人飞行，首飞甚至使得质疑者也赞叹不已。
This effort has included attempts to modify for unmanned flight the MiG-21 (ph) and with greater success an aircraft called the L-29 (ph).
这些无人飞行器中包括改进的无人飞行器米格-21和称之为L-29的飞机。
They also claim that public support for the space program, both manned and unmanned, would decline if humans were not involved in flight.
他们还声称，一旦人不参与太空飞行，无论是对于载人还是无人太空项目，公共的支持都会下降。
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