邻道抑制比（ACRR）：fc-5MHz ≤-45dBc/30KHz fc+5MHz ≤-45dBc/30KHz
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ACRR Adjacent Channel Rejection Ratio 邻道抑制比
In a survey by the ACRR of several dozen cities in northern Europe, only a few small cities in Austria and Holland produced less trash per person.
根据ACRR对北欧好几个城市所作的调查，只有少数奥地利和荷兰的小城平均每人制造的垃圾量有减少。
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