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2. Chain of responsibility modelLet me give you an example: Diaosi Wang Tiezhu moved bricks in Beijing, but he thought he was very close to his girl Lin Zhiling. No, he found the following 10 common contents:在途不止一日，每到一地，还要知会当地官府，免得造成误会，便是快马加鞭，也在二月下旬才赶到湖州境内。故而不敢贸然行事，做出决定。Public int calculation (String exp) {The extensive deployment of network services used by the amplifier determines the scale and severity of the amplification attack, If some network services exist, No authentication is required and the amplification effect is very good, but the number of deployments on the Internet is very small, so the amplification using this network service cannot achieve a large traffic and the effect of effectively consuming broadband resources, and this network service cannot be used as the main amplification attack traffic, but can only be used as an auxiliary means.不过也对。