It was taken by a camera on board mars reconnaissance orbiter , a craft that has been orbiting mars since 2006 .
这是由自2006年就环绕火星飞行的的勘测轨道飞行器上的照相机拍摄的。
The netherlands has given up maritime reconnaissance ; denmark has abandoned submarines .
荷兰已经放弃其海域侦察活动;丹麦也已放弃其潜艇计划。
The field of dunes , which covers an area about the size of texas , were photographed over two seasons by a high-resolution camera on nasa 's mars reconnaissance orbiter .
Some nation-states are actively doing reconnaissance to identify specific vulnerabilities in these networks .
一些国家正在积极的进行勘察以期在这些系统中找出具体的薄弱点。
This 38 metre-long remotely operated airship is designed to carry communications and monitoring equipment for intelligence , surveillance and reconnaissance missions .
这架长达38米的远程遥控飞船原本是为情报机构服务,用以承载通信监测仪器来完成监控和勘察的使命。
Western defence experts said the launch could mark a new step in iran acquiring reconnaissance and intelligence-gathering capability .
西方防务专家表示,此次发射可能标志着伊朗在掌握侦察和情报收集能力方面迈出新的一步。
Another unit , the special reconnaissance regiment , was added to the special forces manpower .