广告，海报公共布告，如广告招贴。
原来的公共安架构已经被提升为全社会遍布告密者的普遍体系。
The formal public security structure was augmented by a pervasive system of informers throughout the society.
原来的公共安架构已经被提升为全社会遍布告密者的普遍体系。
The formal public security structure was augmented by a pervasive system of informers throughout the society.
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