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Iterative sub-patterns: Iterative sub-patterns can sequentially access elements in an aggregation without exposing the internal appearance of the aggregation. The aggregation of multiple objects is called aggregation. Aggregation objects are container objects that can contain a group of objects. Iterative subpatterns encapsulate iterative logic into a separate subobject, thus separating it from the aggregation itself. Iterative subpatterns simplify the aggregated interface. Each aggregated object can have one or more iterative subobjects, and the iterative states of each iterative subobject can be independent of each other. Iterative algorithms can be independent of aggregation role changes.Well, this article has already summarized how to add, delete and modify iptables rules. Combined with the previous article, we have mastered the "add, delete, change and check" of iptables rules. At the same time, this article has also summarized how to set the default strategy of the chain and how to save iptables rules.　　游走在多名女性间的凉对于爱情早已麻木，却在遇见优子时，感受到了不同于以往的感觉，那是一种命定的吸引，而优子也不受控制的喜欢着凉。但两人的相恋却注定是一场悲剧，随着故事的发展，真相渐渐浮出水面，等待凉和优子的究竟是幸福的彼岸还是更深的深渊？于是将盔甲穿戴整齐，在正午人最多的时候，飞身跃上高台。下载好游戏，然后进入。为了准备结婚而辞去工作的也映子，居然被未婚夫以「有其他喜欢的人了」为由狠狠甩掉。原本万念俱灰的她偶然听见「G弦上的咏叹调」而获得心灵上的救赎，在无业的状态下投入时间跟金钱开始学习小提琴，为的就是希望有天能亲手拉出「G弦」这首曲子来。和她同在一间教室的，还有有婆媳问题的中年家庭主妇，以及曾经差点成为小提琴老师小舅子的大学生……