Detections of the spectral lines is an important issue in the passive sonar system.

在被动声纳系统中，线谱检测是一个至关重要的问题。

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Besides, the Pentagon claims that China attacked the sonar system of the Impeccable first.

另外，美国五角大楼说，是中方先袭击“无瑕号”的声纳系统。

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And it can provide signal to sonar system for the use of function check and capability test.

同时还生成并向声纳系统提供这些信号作为声纳功能检查或性能测试之用。

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Because there is no clear definition of harassment, the Navy's efforts to deploy an up-to-date sonar system have been delayed for more than six years.

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They have played a decisive role in dozens of environmental victories, from the phasing out of lead in petrol in the 1970s to stopping the navy in 2003 from using a sonar system that would have deafened or even killed whales.

ECONOMIST: The environmental movement

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FORBES: Car of the Week: 2012 Infiniti G37 Coupe