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Yu Shou Yu Attacks, Steel Armor (Pan Feng, Gongsun Zan) Suppresses (Yuan Shu)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.善良乐观、积极向上的曾善美为了供养大大小小一家人和资助在杭州攻读硕士的男朋友景融，每天身兼数职，辛苦打工赚钱。有人说她傻，但是善美却问这样的付出甘之如饴。景融即将毕业，善美不顾家人和朋友的强剧照烈反对，决定为爱远走天涯，她辞去工作只身奔赴杭州，满心期待着和男友结婚。Precautions?Behavior patterns of objects-Use object aggregation to allocate behaviors.1996年夏，大学毕业已三年的同窗袁浩东（刘烨饰）、郭洋港（沙溢饰）、赵家乐（李光洁饰）各自经历着不同的生活。终于，三人带着梦想重回北京，相聚一起创业。然而涉世未深的三人很快碰壁，心灰意冷的浩东欲与大学女友林紫云（赵子琪饰）分手。1998年夏，在赵父赵振庭（樊志起饰）的帮助下，三人重新振作接手杂志社。When the poor think about buying a house, they first consider: how much I have in savings and how much my monthly income is, and then calculate in reverse whether they should buy a house and what kind of house they should buy. When the rich think about buying a house, they first consider: Do I want to buy a house or not and what kind of house do I want to buy? Then calculate, how much is still missing and how to solve it.