研究结果表明：灾害经历对于风险感知具有正负两种效应；
The results showed that: (i) hazard experience had both negative and positive effects;
感知风险理论是消费者行为理论的重要内容之一。
Risk Perceive Theory is one of the important aspects of Consumer Behavior Theory.
无人机是一种低风险、高效费比的战场感知战斗平台。
The UAV is a low-cost and high cost performance effective battlefield awareness combat platform.
无人机是一种低风险、高效费比的战场感知战斗平台。
The UAV is a low-cost and high cost performance effective battlefield awareness combat platform.
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