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If the message has been matched by the previous rule, iptables performs the corresponding action on the message, Even the latter rules match the current message, It is very likely that there will be no chance to perform corresponding actions on the message again. Take the above figure as an example, the message is first matched by the first rule, so the current message is "released", because the message has already been released, so even if the second rule in the above figure can match the message just "released", there is no chance to discard the message just now. This is how iptables works.After today's headline, the main app, had a large flow and encountered a bottleneck in growth, it began to hatch each seed app to find a matrix, and all had strong competitors to compete. Social benchmarking microblogs, short videos, fast players and even searches are also benchmarking Baidu.The biggest problem for programmers is "conceit". Especially when we review other people's codes, I have seen countless scenes. When programmers review codes, they begin to attack other people's codes and question other people's abilities. It's ridiculous. I analyzed it. This kind of programmer actually has no skill, because they accuse each other of trying to tell everyone how good they are. To show their programmers by this means is actually what the legend calls "half a bottle of water".The turn signal must be turned on when the vehicle changes positions, and the only one that cannot be turned on is to enter the roundabout (turntable).搞砸一次重要表演后，花样滑冰运动员凯特·贝克尔（卡雅·斯考达里奥 饰）竭力想要重振自己的职业生涯，为此她必须克服家庭因素和重重心魔。30岁医生徐允在（孔侑饰）被只有18岁的高中生姜京俊(申元浩饰)灵魂附身。因意外灵魂交换的徐允在经四处打听来到昏迷中的姜京俊所在医院，却发现自己的照片出现在医院海报上，原来这家医院就是徐允在之前工作的地方。允在的未婚妻吉多兰（李敏贞饰）因为未婚夫的突然转变也遭遇了前所未有的经历……