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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.新西班牙总督弗朗西斯科则是一位标准的贵族，头发与胡须同样齐整，高领衬衣，紧身贵族小袄，双目颇显威风与不羁，只是面对杨长帆不得不收敛几分。众人听得轰然大笑起来。事业有成的大律师池海东在自己的离婚案中输给了妻子的代理律师罗鹂。不相信爱情的两人， 阴错阳差之下常常代理同一个离婚案件。他们帮助离婚双方心平气和地分手，开始新的生活，甚至有时劝和要离婚的夫妻；也帮助身边的家人朋友解决各种危机。 随着案件的进展，罗鹂和池海东之间的关系，也从单纯的竞争对手发生了微妙的变化，两人逐渐被对方的才华和品格所吸引，两个不相信爱情的离婚律师，最终慢慢地走到了一起。红椒扯扯大苞谷的耳朵，嗔怪道：六弟，你就不能安生两日？花生笑道：二姐姐，他马上就会安生了。"Where I hope the company can improve"