And from that lens, what the NSA has done is equivalent to the authorities back in Germany inserting some device into every printing press that would reveal which books people bought and what they read.
从那个角度看来， 美国国家安全局做的事相当于 德国当局 在每个印刷机里装上设备 了解人们买了哪些书 和他们所阅读的内容。