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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.桑迪是一位全职主妇，她每天细心照料着一儿一女，是丈夫的贤内助。然而，在为儿子寻找生日派对视频时，她无意中发现了丈夫偷情的证据，这残酷的现实让她崩溃。她义无反顾地离婚，并带孩子来到纽约，一边租房子，一边求职。在租房时，她遇到了一个年轻的房东弗兰克）。后者是在咖啡馆打工的伙计，也刚刚离婚，并面试成功某妇女中心的工作。在一次主动防御课上，两人再度邂逅，他是全副武装的陪练，而她则是受训的学员。当导师劝诱下，她进入了状态，把对丈夫满腔怒火发泄到他身上。在那一刻，他也突然理解了这个房客的苦衷，两人情感升温。在桑迪的力邀下，弗兰克成为了她孩子的保姆，两人也在接触中逐渐碰撞出了火花3 SensorsStructural inspection《深夜书店》讲述了一家24小时营业“深夜书店”里跨越时空的玄幻、惊悚、爱情故事：在一个风雨交加的深夜，一人度过孤独千年的书店店长老白照例给每个读者免费送上半杯“深夜牛奶”，时钟快要指向凌晨整点，老白叹了口气转身进入了地下书库。只听见头顶的书店里突然传来凄厉的哭声和惨笑……Ctrl + ClickThings are actually developing in a good direction here. Because they moved their hands, the collectors certainly could not stay here, fearing that the platform would be in trouble if they called the police, so they withdrew all their staff, and they also withdrew first because of something happened to the company.