This mode applies to scenarios: If we want to add new functions to an existing class, we have to consider several things: 1. Will the new functions have compatibility problems with the existing functions? 2. Will it need to be added later? 3. What if the class does not allow code modification? Facing these problems, the best solution is to use visitor mode, which is suitable for systems with relatively stable data structure, decoupling data structure and algorithm,
再说李敬文，一踏入东院上房门槛，屋内说笑的少年们看见他都愣住了，玄龟呆呆地想：媳妇要飞了。
亲的葬礼心中愧疚，硬将她接到杭州家中以尽孝，可是媳妇徐丽事事争强，婆媳矛盾不断。在上海的大女儿沈梅瞒着老妈离婚又再婚，并失去了孩子抚养权，而敢爱敢恨的小女儿沈湘却大胆追求前姐夫柴海青，这让母女、姐妹之间冲突大发。生日宴上，儿女们因故缺席，老妈在亲友面前大失颜面，赌气去当保姆，一篇“空巢老人离家当保姆”的报道引发社会舆论，让儿女们抓狂。沈越见岳父被儿子气死，他深感“子欲养而亲不待”的愧疚，决定放弃外派提拔，守在母亲身边。沈梅因家暴再次离婚，身心憔悴，又查出尿毒症。前夫柴海青捐肾相救，两人破镜重圆。沈湘也终于找到了自己的爱情并专做老年人电视节目。在儿女的孝顺中老妈积极面对生活，享受生命的每一天。
一个八岁的顽童———小王爷刘赞顽皮好动、不守常规，被大奸臣梁冀利用强行扶上皇位，混充皇上；同时刘赞还陷入了支持堂兄刘蒜为皇上的大臣李固一派和梁冀之间的殊死斗争中。紧张激烈的故事，阴险毒辣的宫廷争斗，惊险疯狂的刺杀行动，变态的和缠绵的爱情，气势宏大的厮杀场面，贯穿着男主人公———一个八岁孩童顽皮的言行情态，让险的更险、恶的更恶的同时，亦让紧张地让人透不过气的快节奏中，有了会心的笑容。
一位母亲处理她儿子的痛苦。
2045年，科拉普斯液体污染了全世界。
At present, many places have made it clear that female workers can receive a certain monthly subsidy for sanitary supplies. In recent years, with the rise in prices, this "subsidy" has also risen.
所以说，汉王那边现在是危险重重，只是还没有显露出来而已。
从另一个世界穿越过来的林一凡本是剑圣的得意弟子，为了回到自己的世界，他开了一家叫做“施仁堂”的中医铺子，在治病救人的时候，收集各种信息。在他的店里，有两位雇员，一位是身怀特殊血脉的暖男，一位是呆萌的小白女。三人相依为命，为了自己身上的谜，走上了一条不能回头的路……
Sister Ping said that she didn't think too much about dyeing vegetation, but simply wanted to do one thing well. As to whether it could produce economic benefits, she didn't specifically consider it. I wish I were happy to do it.
Stephen went back to the sanctuary and locked himself in the room. His physiological reaction could not be ignored. He stroked himself with some unfamiliar hands, trying to relieve his desire but was disorganized. He began to recall what he had just seen and did it hastily.
民国期间，由四个性格迥异的少年组成了少年侦探社，他们破解重重谜团，名声大震，然而这所有的案件似乎都没有表面上那么简单，上一代的恩怨情仇也慢慢浮现，侦探社四个成员之间的关系也开始错综复杂……
Separate the internal representation of the product from the construction process of the product. Q: How can they be separated? Answer: Don't put the construction process of the product in the product class, but the builder class is responsible for the construction process, and the internal representation of the product is put in the product class, so it is not separated.
这里绿竹对春花哼了一声道：连我们也常来厨房帮把手，你正经厨房人，倒挑三拣四的。
然而，联邦自身却并无多大改善，一天天持续着向官僚主义及特权主义堕落，甚至欲制订法案，让地球变成少数特权阶级居住的场所。
高良健吾搭档尾野真千子共演的新片《你是好孩子》曝光单人视觉海报。该片由大热影片《只在那里发光》的导演吴美保掌镜，高良与尾野的角色造型伴随海报提前公开。
孪生姐妹紫兰和百合因种种误会成为陌路人，六十年后，因为百合的女儿需要换肾，两人又重新走到一起，多年的误会消除了，善良的人们在真情的付出中得到了幸福的回报。
更让人感动的是此人心思细腻，很为别人着想，那依旧清晰地记得，那晚在上蔡城外的河边，他专门为自己找出一件小房子，给自己时间送别舅舅的时间，这份恩情她铭记于心，丝毫不敢忘却。
先帝驾崩，太子巡游在外。皇叔篡位并自封厉帝执掌朝政。身为当朝太子后母却又是与太子自小青梅竹马的婉后迫于无奈，委身厉帝，并希冀以此保太子周全。
