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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.你才被狗撵了……吕馨喘了几口气，然后拿起茶几上陈启的茶杯，咕噜咕噜的喝了起来。王爷，这塘里怎没种些荷花？五柳先生见池塘里没有残荷，就问板栗。沈悯芮透露出了少有的钦佩，不觉间与杨长帆凑近了一步，品到这步，已经突破了大家水准，而是创造了全新的角度。心儿精心策划得以进宫当宫女，没有人知道她对洛阳行宫了如指掌，也没有人知道她每晚刺绣的百花图蕴涵了什么秘密。她通过巧妙的方法进入了司膳坊，又通过送饭接触到了王皇后，面对逃亡的困难，她的计划可谓出神入化，登峰造极，可是依然面对着无数的考验，她意外地发现被她放了鸽子的未婚夫裴少卿居然是洛阳行宫的城门官，他对她进宫的动机始终抱有怀疑，而她出色的刺绣技术获得了武媚娘的青睐，成为武媚娘身边最亲近的近臣······Lazy loading, asynchronous and parallel processing　　女主Praemai，爸爸和别的女人在一起，她和妈妈相依为命，妈妈用爱把她抚养长大，让她学会用美丽的眼睛看待世界，懂得知足常乐，聪慧，讨厌花心大萝卜，开始时很讨厌Win，想整治他的臭脾气，后来发现他之所以这样是因为缺少父母 关爱，开始帮助他一起面对生活的问题