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In the historical substitution principle, the methods of the subclass to the parent class should not be overridden or overloaded as far as possible. Because the parent class represents a well-defined structure, subclasses should not destroy it casually by interacting with the outside world through this standardized interface.4. "Towing lamp" means a yellow lamp having the same characteristics as the "tail lamp" mentioned in paragraph 3 of this Article.大龙小龙是一对亲兄弟，一起经营者家族企业————卖酒，奈何酒总是卖不出去，日子过得紧巴巴。人穷志不短，深受香港电影影响的大龙想要成为赌圣发哥，而小龙想要成为像李小龙一样的一代功夫大侠，并追到自己喜欢的女孩———甄漂亮。大龙想了个歪主意赚钱，却被暗算，钱被骗光。大龙找到王科希望能帮助自己，但没想到却把自己家的房子也给搭了进去。大龙小龙失败后回了家，买了酒的饭店老板来找麻烦，仇人王科也追来要债，母子三人被勒令三日之内搬出家门，三人万念俱灰。大龙出去学习后回到了家，自称学到一身赌术的他和小龙制造了一个陷阱，等着罪恶至极的王科往下跳……"These DDoS attacks have developed very rapidly recently, and each new attack adopts a different implementation strategy from the previous one," said LynnPrice, a security strategy expert in IBM's finance department. In essence, the attacker's strategy aims to improve his own attack capability, with the help of advanced infrastructure and application pointing tools, and to realize the automation of attack activities.贞淑（韩智慧 饰）还没出生前爷爷就和望族宗孙赫俊（李东健 饰）订了娃娃亲，随后贞淑家慢慢衰落，剩下贞淑与妈妈相依为命。一晃眼十多年过去了，赫俊成了英俊潇洒的检察官，而贞淑则上高三了。一天晚上，贞淑和几个死党泡吧时被检察官赫俊发现，几人被他狠狠训了一顿，因为未成年人不准进入这类娱乐场所。几日后，贞淑和赫俊在大人的安排下相了亲，这时两人才发现原来对方就是自己的对象。尽管双方都对对方不满意，但赫俊为了实践爷爷的承诺，和贞淑订下了契约，两人婚后各走各路、互不相干。侠客文化是一棵大树，但是他陈启并不需要依靠这棵大树。