It has been observed that the submarine is a "covert and persistent" Intelligence, Surveillance and Reconnaissance (ISR) platform, capable of loitering for long periods close to an enemy.
它已经被观察潜水艇是“隐蔽的和稳固的”情报、监视和侦察(isr)平台，有能力徘徊用于长期接近到一个敌人。
It has been observed that the submarine is a "covert and persistent" Intelligence, Surveillance and Reconnaissance (ISR) platform, capable of loitering for long periods close to an enemy.
它已经被观察潜水艇是“隐蔽的和稳固的”情报、监视和侦察(isr)平台，有能力徘徊用于长期接近到一个敌人。
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