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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.楚王宁弈，看似风流散漫的当朝六皇子，内心却背负着惨痛往事。他以天下为棋局，洗雪冤屈、惩治奸佞、整肃朝纲，在腥风血雨的朝堂争斗中步步为营。凤知微，被逐高门之女，不甘屈服于坎坷的命运，女扮男装进入青溟书院，一跃成为无双国士魏知，风云渐起于朝野。一个是城府深藏的亲王，一个是初露锋芒的官场新秀，两人在风云诡变的朝堂里彼此试探、频频过招，相互排斥却又不自禁相互吸引。而当彼此的心渐渐向对方敞开，邂逅的却是命运彻骨的森凉I went through the bullets to sleep with you.　　罗放和赵磊将付强送进医院，在医院赵磊见到老婆潘薇，因为潘薇正在和赵磊闹离婚，所以见面的气氛微妙。他们离婚的原因是因为孩子，孩子因为有血液病而做透析，但终于孩子还是死了。静静的，只听得风声水响和各样虫鸣。可事情总是没有那么遂心，不得已的情况下，尹旭在平定河北之地后，调动主力南下进攻齐鲁，兵围临淄。