If they found encrypted communication, they stayed on that channel and they wrote down, that's a channel that these people communicate in, these law enforcement agencies, and they went to 20 metropolitan areas and listened in on conversations that were happening at those frequencies.
如果他们找到了加密的对话，他们就停留 在那个频道，然后写下这是 那些人交流的频道， 那些执法机构， 他们去了20个大都市区监听 这些频道上的所进行的对话。