In order to use any XM radio receiver, the radio must be "activated" by a special signal sent from the XM radio satellites.
为了使用任何XM卫星广播接收器，无线电必须被“激活”由来自XM卫星广播卫星发出了一个特殊的信号。
In order to use any XM radio receiver, the radio must be "activated" by a special signal sent from the XM radio satellites.
为了使用任何XM卫星广播接收器，无线电必须被“激活”由来自XM卫星广播卫星发出了一个特殊的信号。
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