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谁料凭空起波澜，连皇上都插手，不让张家轻易认他这个儿子，真是太好了。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.全息投影电影都被淘汰很久了，现在都是真实电影。做工的人面面相觑，交头接耳。　　身在美国宾夕法尼亚州的藏獒专家卓木强巴突然收到一个陌生人送来的信封，装着两张照片，惊现的远古神兽，促使卓木强巴及导师、世界犬类学专家方新教授亲赴西藏，发现照片上的动物竟然和帕巴拉神庙有关……