Visitor mode is to encapsulate some operations applied to a certain data structure. Once these operations need to be modified, the data structure that accepts this operation can be saved unchanged. Visitor mode is suitable for systems with relatively stable data structures. It reduces the coupling degree between data structures and operations acting on data structures, making the set of operations relatively free to change. The specific structure diagram is as follows:
庞夫人大怒道：不承认？百姓的眼睛是瞎的？那郑婆子会闹，老身就不会闹了？走，把钰儿的尸首抬上，咱们去张家会会那乡下来的老侯夫人。
旅行中的奇诺和艾鲁梅斯来到了一个科学高度发达的文明国家。在安定的环境下，该国家人民均生活在巨蛋之内。一方面，这个国家是由杰出人士们创造出来的“开拓地”，然而另一方面，他们又同时渴望着巨蛋之外真实的阳光和土地。
For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.
第二季审视毒品问题对城市贫民阶层的影响，尤其探讨了以码头工人为代表的蓝领阶层的生存困境，他们中有些人通过帮助走私集团运送毒品和其他违禁品讨生活。同时也讲述了Barksdale团伙于Avon入狱后是如何在Stringer Bell的领导下继续发展。
这样的事情之前是发生过的。
这就叫‘不做亏心事，不怕鬼敲门。
"What happened later?" I knew the story was far from over, so I couldn't wait to ask him.
《真正男子汉第二季》是由中国人民解放军八一电影制片厂和湖南卫视联合推出的大型的国防教育特别节目。节目记录8位有年龄跨度，性格标签各异的明星，深入一线部队，改变身份，在不同军兵种经历4次5天4晚的真实军营体验，与年轻的部队战士同吃同住同训练。[1] 第二季正式加入女兵环节。
2. Practical materials
《神奇宝贝》（ポケモン）是由汤山邦彦执导的电视动画系列，改编自口袋妖怪系列游戏。
影片改编自法国历史上的著名冤案“德莱弗斯案件”。1894年，法国犹太裔上尉阿尔弗雷德·德莱弗斯(加瑞尔饰)被错判为德国间谍，被判处叛国罪。
Conners已更新！ 美国广播公司娱乐公司总裁Karey Burke宣布，美国广播公司电视网已下令第二季大一喜剧。
说到底，这事是小葱惹来的不是？小葱敛去笑容，垂眸不语，捡了块点心慢慢吃着。
车启英（朴诗妍 饰）是一名新闻主播，拥有着姣好面孔的她稳坐当家花旦的交椅，在事业上一帆风顺。然而，她的感情生活却是一片空白。车启英从小生活在破碎的家庭之中，早就丧失了对于婚姻和爱情的信任和渴望，她甚至觉得自己永远都不会想要结婚，也不想生孩子，婚姻对于她来说，不过就是一个会让人越陷越深的漩涡而已。
《傀儡花》。台湾史小说。描述一八六七年台湾恒春半岛的故事，故事中的事件史有明文，人物则有九成是确有其人。傀儡花指的是女主角潘蝶妹，为客家人父亲和嘉礼番公主的混血女儿，但因传言讹误，误读为傀儡番，才被称为傀儡花。公视将拍连续剧（时代历史剧）……
"It 's a flying bee, Wings are particularly numerous, He was covered in yellow and black, It is the way yellow and black are arranged in such a way. One by one is as big as a slap with an open hand. As soon as it flies, it is a large area. There is a poisonous needle behind the belly, It stings people, One can kill you, My comrades around me, Because there are no fewer than five sacrifices, I remember when the battle was coming to an end, I helped a comrade-in-arms who was stung to squeeze poison out, To squeeze, The wound, which was almost the size of a grain of rice, gushed out a pale yellow 'water', Sprayed directly on my neck, At that time, I felt that my neck was burning, then I felt pain first, then numbness. At the most numbness, my whole head lost consciousness. My neck drooped down and my comrades washed the spilled place several times with river water. It took me a long time to recover. I thought that it was the same when I sprayed it on my body. If I stung it directly into my body, I would basically not live. " Zhang Xiaobo pointed to his neck as he said.
