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我先简单说一下，国术的三大境界：明劲、暗劲、化劲。In addition, the structure of the mind map is divergent, which is very beneficial to the divergent thinking and creative thinking of the brain, and it is also easy to add new content. However, if new content is added in the middle of the two lines of text notes, the traditional linear notes will become dense, and even the lines will be introduced everywhere, which is neither good-looking nor conducive to summary.玉米捡起一块，一口咬下一半。《灵魂摆渡·南洋传说》讲述了夏冬青与灵魂摆渡人赵吏一同帮助因有心事未了而停留人间的灵魂，他们的故事。外表看起来没有任何存在感的夏冬青，有一个不为人知的秘密，他有双特别的眼睛。他可以看到另一个世界的众生，俗称的阴阳眼，并且与他们沟通。这秘密带给了夏冬青不少麻烦。The SYN-Flood attack is currently the most common DDoS attack on the network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing. This kind of attack was discovered as early as 1996, but it still shows great vitality. Many operating systems, even firewalls and routers, cannot effectively defend against this kind of attack, and it is very difficult to trace it because it can easily forge the source address. Its packet characteristics are usually that the source sends a large number of SYN packets and lacks the last handshake ACK reply of the three handshakes.