名词
中文翻译：Unknown
同义词：
['surveillance', 'reconnaissance']
例句：
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1.The military conducted a thorough reconnaissance mission before launching the attack.
军队在发动攻击前进行了彻底的侦察任务。
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2. The spy agency was conducting a reconnaissance operation in the area.
间谍机构正在该地区进行侦查操作。
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3. The government has launched a new reconnaissance satellite to monitor the border.
政府已经发射了一个新的侦察卫星来监视边境。