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The essence of these 23 design patterns is the practical application of object-oriented design principles, and it is a full understanding of the encapsulation, inheritance and polymorphism of classes, as well as the association and combination of classes.眼镜男好像来气了：那就打个比方，你，杨长帆，当时站在郑和的位置上，你能不能改变这件事？哈哈哈。保卫国土2020尽管校长誓将咸蛋小学建设成为全国优秀名校，却因长期经营不善，濒临倒闭，这引起金蛋小学校长的觊觎。贵族学校金蛋小学，财大气粗，一直伺机吞拼咸蛋小学：被收买了的咸蛋小学训导主任时常上演无间道，给伦文叙和咸蛋小学添乱；而金蛋小学的学生又不时上门挑衅，给咸蛋小学制造难题和危机。葫芦莫名其妙地问道：西边？西边咋了？我们是从北边回来的。At Altra Motors, Mr. Hulot designs an ingenious camper car with lots of clever features. A lorry hauls the prototype to an important auto show in Amsterdam, with Mr. Hulot alongside in his car and a spoiled, trendy PR exec, the young Maria, in her sports car packed with designer clothes and her fluffy dog. The lorry has every imaginable problem, delaying its arrival.　　丁达不敢相信这是真的，但职业的敏感和守护国门的职责，让他不能不盯上何立东为重点工程的化工厂供应的进口设备——这些设备，事关国家利益和人民生命财产安全。