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Iterator pattern provides a way to access each element in a collection object sequentially without exposing the internal representation of the object, which can not only not expose the internal structure of the collection, but also allow external code to transparently access the internal elements of the collection. The specific structure diagram is shown below.一对侦探和恋人过着幸福的生活，他们彼此相爱、并且在工作中配合得相得益彰，屡立战功。然而，在一次恐怖的鲨鱼袭击之后，两个人经历了惨痛的伤害，险些双双丧命，最终幸运的存活下来。经历了这次意外的遭遇和重创，他们的身体和心理都留下了很大的创伤和阴影，之前的幸福生活也发生了彻底的改变。多年之后，命运让他们再次聚集在一起，并且重操旧业，追捕最危险的犯罪分子，面对连环杀手的围追堵截，他们通力合作，与黑暗势力展开了殊死搏斗。跟着【碰碰狐体操】欢快的节奏，一起练体操吧！不但可以提高身体的协调能力，还可以培养对音乐节奏的感知与把握。既有能长个子的《做篮球体操长个子》，还有放松膝盖的《膝盖拍拍》，以及能够塑造身形的《天鹅芭蕾》。除此之外《猎豹跑跑》等多种主题的体操，把孩子们的身体锻炼得棒棒的！System.out.println ("initialization state is:" + origi.getValue ());"That maybe, half way still want to kill? Finally, on the way back to drag, Liu Gui took a group of people to search the room one by one and found a notebook, as if it were Shan Guoxi's, with the list of people who killed the old summer on it.