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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.3. Ships out of control, ships with limited manoeuvring ability, ships with limited draft, sailing boats, ships engaged in fishing, and ships engaged in towing or pushing other ships shall sound three consecutive sounds at intervals of not more than 2 minutes at a time, i.e. One long sound followed by two short sounds, in place of the sound signals specified in paragraphs 1 or 2 of this Article.吕雉劝道：放心好，到时候一定会没事的，只不过现在韩元帅还没有发话，所以只能如此了。《曼达洛人TheMandalorian》第二季季终的彩蛋部份,正式确认Disney+会在21年12月推出衍生剧《波巴?费特之书TheBookofBobaFett》。要知道怀孕头几个月最是要紧的。