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As the name implies, iterator pattern is to access objects in an aggregation sequentially. Generally speaking, it is very common in collections. If you are familiar with collection classes, it will be very easy to understand this pattern. This sentence contains two meanings: one is the object that needs to be traversed, that is, the aggregated object, and the other is the iterator object, which is used to traverse the aggregated object. Let's look at the diagram:There are 31 events in the Olympic swimming competition, which is the second largest gold medalist after track and field.Chow Yun Fat Endorsements: HK Million Every 2 Years Zhang Xueyou Endorsements: HK Million Every YearGenerally speaking, classifiers will face two kinds of antagonistic inputs sooner or later: mutation input, which is a variant of known attacks specially designed to avoid classifiers; Zero-day input, which has never been seen before the payload. Let's explore each antagonistic input in turn.　　秋月过门后，处处受婆婆的虐待，小姑的妒忌，叔伯的从中作梗，不懂事的小丈夫天赐更是经常为难秋月，秋月忍气吞声，委曲求全。之前，他担心玄武王兵权过重，好容易他从边关返京，便顺水推舟准他回乡祭祖。狼牙特战基地的高胜寒接到了新的任务：调到陆航旅去组建和训练一支特殊的特战分队，代号“霹雳火”。高胜寒带着资深军士长马路和一直闯祸的王星来到了陆航，却没想到遇到了曾经的战友崔华盾和昔日恋人曾紫陌。作为军医的曾紫陌也参加了集训，她深知组建霹雳火的意义。经过各种残酷的考验，霹雳火特战分队正式成立。他们首要面临的任务便是西南地区的抢险救灾。高胜寒主动请缨要求高空跳伞，成为了进入震中的第一批救援队伍，打通了生命通道。载誉归来后，霹雳火又投入到去边境营救被贩毒武装抓获的侦察员的任务，并到非洲A国担任武装护卫、保护撤侨。经历了重重血与火的考验，霹雳火逐渐走向成熟，开创了中国陆航的新历史。