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Explain that in the OrderPizza method, we do a lot of things, including calling the CreatePizza method to generate a desired pizza, and then doing a series of operations on the pizza. The key point is that Pizza is defined as an abstract class, which means that in the OrderPizza method we don't care what type this Pizza is at runtime, in other words, this is decoupling. The coupling between PizzaStore and Pizza is uncoupled.但是事实上，沈炎略微犹豫后，就果断翻开了《神雕侠侣》。关晓彤(蔡琳饰）是个上海音乐学院的高材生，她时常会做梦，梦到自己掉入海中，然后被一个男子救起来，她知道这就是她的真命天子，一次去希腊旅行让她结识两个男人，一个是从网络上找来的素不相识的浪子故事发生在南方某海军新兵入伍后的故事。一群从城市里来到部队当兵的女孩，带着梦想，踏着青春的脚步走进了军营。部队严明的纪律，严格的训练，刷掉了独生子女身上的娇气，做一名合格的军人，成为她们理想的目标。Prince Varana gives you a sealed scroll. >Due to the weakness of breathing and coughing, the secretion in the airway is difficult to discharge, which is more likely to cause obstruction, causing bursts of rapid breathing, or the rattling sound in the airway-this is often a strong sign at the end of life, so it is called death guttural sound. 鲛奴被逐出龙宫，巧遇书生景云瑞.瑞邀奴结伴还乡，并对她渐生爱慕，惟仙凡有别，奴不肯接纳婚聘，瑞抑郁成病。奴偶遇与她容貎酷似的陶万珠，欲设法玉成珠、瑞。后奴获龙王宽恕，赦免放逐，遂向瑞许诺若他肯娶珠，一年后必再相见。一年过去，伊人未见，瑞方知道这是哄骗他迎娶珠的方法，终发疯投奔大海，与奴相见。