More often, UAVs were defeated by the immaturity of the available technology, changing needs, soaring costs and, above all, the successful development of rival technologies.

 
  • 而更通常出现的情况是,无人机没能得到实际的运用,原因有很多,如现有科技的不成熟、需求不断变化、成本迅疾飙升,而最重要的是,对手的科技成果得到成功的发展。
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