The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu
不行，这是我多年来智慧的结晶，我是有匠心的人。
本剧根据历史事实虚构而成。其中主要事件，如“唐绍仪计划”、“蓝色计划”、“汪精卫投敌”、“河内刺杀汪精卫”、“滇军通电全国”等，都有据可查。这种在广阔历史背景下进行艺术虚构，是作家潘军的一贯风格，使作品厚实凝重
Stocks have double-click and double-kill, as do investors themselves. Many unknown people rely on the classic record of a certain year or a certain year, and their performance has soared and their popularity has soared. This is actually a double-click process. This is undoubtedly a lucky good thing in itself, but if you are praised for kidnapping, you will only cheat yourself in the end, and then bitter double killings are almost inevitable. There are not many fresh passages in the investment plot, and the main characters are changed frequently. An iron law in the business world is that there must be high barriers to excess returns. This bumpy truth will not change because we invest in stocks or because we choose different investment styles.
公元前三千年前，神农部落成为天下共主，第八代炎帝榆罔掌握着天下的王集和盐田，也由此而掌控着中土的突枭、九黎、西陵、彤等各个部落。祭祀之日，炎帝在梦中得到神谕，西方将有一只部落迁入中土。神农的大祭司勐康预见到这只名叫有熊的部落中将有人会取代炎帝，有意将原本天象显示的大吉之兆谎称为大凶。于是有熊部落一族开始了被神农的鹰犬突枭杀戮和沦为奴隶的坎坷命运。
Absorption of free radicals: Flame retardants act as transfer bodies of free radicals to inactivate them and prevent the reaction of free radicals.
/taunt
1. First turn on the iPhone and click "Settings";
该剧是一部描绘警察大学里发生的青春成长故事的作品。
好一番忍耐后，才定下心，慢慢地问她家中情形。
6 Psychology.
还有我大哥大姐、香荽、玉米……你听着他们的故事觉得很精彩，可是你肯定不能体会他们当时心里的苦楚。
不是能摸到鱼就是鳖，有一次还抓了一条水蛇。
《贤妻》这部戏不但好看而且很有教育意
然后微笑道：心里宽敞明亮，住在哪都一样。
Windows 10 Education 64-bit (OS Build: 16299.125)
皇帝轮流做，明年到我家。
至于那个传说中的合围越军计划更成了无稽之谈……就在汉军一片愁云惨淡的时候，越王尹旭也已经开始了下一步的计划，一环套一环正是越国的风格。
