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Generally speaking, a delegate is a class that maintains a field inside and points to a method. Events can be regarded as variables of one delegate type, and multiple delegates or methods are cancelled through event registration. This article uses delegate and event execution methods to understand the difference between the two.故事发生在三十年代的香港，贪官污吏横行，拐卖案件频发。某日，梁芯（杨怡 饰）前往警局报案，遇见了名为金华（张继聪 饰）的杂差，梁芯深知警局内见钱眼开的歪风邪气，自然没有将破案的指望托付在金华身上。之后，梁芯遇见了警察沉一然（杨明 饰），和其他警探不同，沉一然年轻有为正直勇敢，在他的帮助下，人贩最终落入法网。The real limiting factor for a single attacker who uses spoofing attacks is that if these spoofed packets can be traced back to their real addresses in some way, the attacker will be simply defeated. Although the backtracking process requires some time and cooperation between ISPs, it is not impossible. However, it will be more difficult to prevent distributed SYN flooding attacks launched by attackers using the advantage of the number of hosts in the network. As shown in FIG. 3, these host groups can use direct attacks or further let each host use spoofing attacks.安桐大惊失色，与身旁的辛刚对视一眼，瞬间回过神来。还有淮河之畔，那个素不相识的漂母，当自己饿的几乎晕倒的时候，正是她的一碗热羹就了自己。(Tickets purchased at the ticket vending machine are green on the top and tickets purchased at the manual window are orange on the bottom)今日得皇上赐此二女，真乃雪中送炭，臣已经派人送她们上路了……随着他的述说，永平帝眼睛越睁越大，死死盯住他，咬紧牙关却喝不出一句话。