3. Some types, such as the core trading engine of the exchange, control the trading process. If multiple types can be created, the system will be completely chaotic. (For example, if there are multiple commanders in an army who command at the same time, there will definitely be a mess), so only by using the singleton mode can the core transaction server independently control the whole process. The following is an analysis of some examples that we need to pay attention to when applying singleton pattern in the development process.
If I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.
便是落在他身上，他们也自有办法赎免开脱。
FBI女探员奥莉维亚•德纳姆（Anna Torv 安娜•特弗 饰）精明干练，她刚刚和同事约翰•斯科特（Mark Valley 马克•维利 饰）确立恋爱关系，然而却在某次调查中痛失爱人。奥莉维亚随后被招入专门负责离奇案件的“边缘档案部门”。在此之后，各种匪夷所思事件接连发生，种种迹象表明，这一切似乎与被世人称为“当代爱因斯坦”的沃尔特•贝肖普博士（John Noble 饰）以及资力雄厚、背景神秘的巨力公司有关。随着调查的深入，事件背后的黑幕和秘密逐渐显露出来……
同一个四合院里住着四个不同身份的人——周启明表面是洋行职员，真实身份是潜伏在日本宪兵队里的中共情报员；王韵婷是护士，真实身份是中共济南工委领导下的地下工作者；徐桂花是报社记者，实际上是日本间谍；沈穆之是文具店老板，实际上是国民党特工。周启明的任务是破获日军的“半人马计划”；王韵婷的任务是接近周启明，从而策反他；徐桂花的任务是执行“半人马计划”并找出潜伏在日特内部的中共情报员；沈穆之的任务是暗杀宪兵司令中村并铲除济南城内的汉奸特务。四人同居一院，与敌为邻，为了各自的目标，在一条看不见的战线上展开生死搏杀。最终，为了全中国的胜利，无数共产党员前赴后继、英勇奋战。
1. If there is a boss with high defense limit, the attack damage can only be single digits, and only additional damage can cause effective output. Then up to 300% of the extra injuries of Pineapple will be transformed into MVP, which will quickly open the gap between the two types of players with and without Pineapple, which may serve as a soft boundary for the operation to distinguish the two types of players.
项羽轻声说道：西楚国到今天已经结束了，寡人的生命也走到了尽头……但是你们……寡人想要你们离开自己求生，可是你们都不主动。
买来了《武侠世界》杂志后，童岳等不及回家，在路上的时候，就翻开了杂志。
许多年后，荷尔斯遭到冰魔的爪牙——银狼们的进攻。他们的搏斗吵醒了沉睡中的岩石人毛克。毛克驱散了银狼，荷尔斯则帮岩石人拔掉了插在肩膀上的太阳之剑。毛克承诺，当荷尔斯将剑锻炼完毕、成为太阳之子时，将前来成为荷尔斯的仆从。不久，荷尔斯的父亲病入膏肓。临终前，老人向儿子讲述了避难于此的始末，并鼓励儿子返回家乡，团结一切伙伴打败病魔。伤心的荷尔斯烧掉居住多年的草屋，带着小宠物克洛一同踏上漫布荆棘和困难险阻的返乡之路……
圣尊凌云峰和一批信念坚定的伙伴经过拼死斗争，终于让世界恢复了和平。刚要享受一下来之不易的平静，却突然发现，自己在斗争之前，居然结下了很多情债，而且还有了孩子。是时候要还了！母胎单身，又完全没有恋爱养娃经验的圣尊要开始投入到新的战场了！亲情，爱情来得太突然。
婚礼当先，姐妹靠边！马丽（倪妮 饰）和何静（杨颖 饰）是从小相识的闺蜜，不想却因为一场梦想中的婚礼闹翻了脸，吵翻了天，为了抢在前面把爱情修成正果，两人展开了一场互相拆台，斗智斗勇的新娘大作战。
微短剧《仙女酵母》，她穿着优雅的服装不厌其烦的接着来自人间的电话，为一些人们去解除疑惑。
可是，这一次靖国遭受五国围攻，京城人心惶惶，都道要亡国了。
门帘晃动，一个器宇轩昂，高大威猛的武将手持盾牌冲了进来，正是当时在单父县和尹将军并肩作战，刘邦手下猛将樊哙。
由乔恩·波克坎普编剧，迈克尔·W·沃特金斯执导，詹姆斯·斯派德，梅根·布恩，迪亚哥·克莱特霍夫，瑞安·艾戈尔德，乌尔里奇·汤姆森，阿米尔·阿里森，莫赞·玛诺，哈里·列尼斯等人主演的悬疑犯罪类美剧。
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一九四一年冬，硝烟不散的上海和重庆，陈山被迫卷入风起云涌的谍海漩涡中，他经历与同胞并肩作战，与日谍殊死搏杀，最终一步步成长为坚强勇敢的爱国战士，用热血和青春，在烽烟中砥砺前行！
1800年前，人类恶念凝聚而成的怪物—八歧大蛇肆虐人间，被以草薙家族为首的武术家们用三件神器封印。 现代，世界综合格斗大赛 - THE KING OF FIGHTERS（简称KOF）召开，全世界的格斗高手集聚南镇。草薙家族的传人-草薙京来到南镇之后，他敏锐地感觉到了大蛇之力的复苏，一切迹象表明KOF大赛背后隐藏着一个巨大的阴谋。
