4. Learn from words
Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:
三千年后，少年李靖在昆仑山修行功法，年少气盛的他遵从使命下山降妖除魔，不想刚一下山，就遇到作乱人间的狰狞二兽，李靖紧随其后到达了北方孤城“大荒城”。
像柿子你们家都有，就没拿来现眼了。
范淑香（胡杏儿 饰）和侯若海（李诗韵 饰）是相识多年的好友，彼此之间感情十分要好。范淑香在工作之余还得照顾丈夫和家人，实在是辛苦，而侯若海同名门之子荣耀（王浩信 饰）坠入爱河，嫁入豪门，过着宛如童话一般的幸福生活。和侯若海一比，辛苦付出还常常被丈夫误解的范淑香更觉得失落。
If you only focus on immediate interests, you are likely to win for a while but lose your whole life.
临淄历史悠久，原名营丘，相传太古太昊伏羲氏兴起在齐地。
其后叶问(杜宇航 饰)选择暂别师兄叶天赐(樊少皇 饰)，师妹李美慧(陈嘉桓 饰)引及由一众武馆师兄弟，独自到香港求学。当中，叶问更被外籍人士侮辱，歧视…… 其间，叶问遇上第二位咏春师父梁璧(叶准 饰)，梁璧乃咏春宗师陈华顺之咏春师父梁赞的儿子。叶问得梁璧传授各种咏春功夫，大大提升咏春水平。其后，叶问学业有成，返回家乡与佛山副市长的女儿张永成(黄奕 饰)相恋却
就这么的，她不但把大久拿捏住了，还套出了不少秋霜在京城活动的情形，因此来到王府后，说得更像了。
--Set the database to single-user mode
Tang Lin, producer of CCTV's financial channel "Charming China City", revealed the innovative highlights of the second season. First, the timing of the second season of the program is better than that of the first season. The 19th National Congress and the National Two Sessions have been held one after the other. At the same time, the 40th anniversary of reform and opening-up is a great moment. From the perspective of the country, we can see the pace of our city and the pace of China. Second, humanistic care is more intense. We only do two rounds of competition, so that the city can focus on the program and carry out intensive cultivation, so that the charm of the city can be better released. Third, we should use real elements to express our love for the city. We will follow the process of filming all the city competitions and rehearsals, and aspire to set up a biography for each city. Competition is only a means, reality is the end.
男主(mik饰格兰)空军上尉，接到上级命令保护因拥有绝密武器配方而被恐怖组织追杀的美女科学家(stephany饰艾琳)。为了隐藏女主身份，上级命令男主和女主假扮夫妻，男主为了调查前女友被杀害的真相，答应了假结婚这个建议。在朝夕相处中，男女主两人渐生情愫！
田雨秋(林青霞饰)是一位充满爱心的护士，本着爱乡爱民的心在山中的矿区为病人服务，因此博得众人的钦佩爱戴。 沙梦雄(秦祥林饰)为赴况区寻宝，但遭到陷害和田雨秋一起受困矿坑中，两人为求生存而培养出相爱之情，携手突破困境，因而结为连理。
What does this picture mean? It means that the prerouting "chain" only has the functions corresponding to the nat table, raw table and mangle table, so the rules in prerouting can only be stored in the nat table, raw table and mangle table.
年前的科学家塞斯刚刚发明一台能传送物体的“电动传送机”，这台机器能将物体分解，传送完成后再自动合成还原。兴奋不已的塞斯决定亲自体验一下电动传送，于是，他进入了传送仓。不幸的是，一只苍蝇这时也飞进了传送仓，于是，在机器将分解后的塞斯的分子再合成时，将苍蝇的分子也合成到了塞斯的体内。塞斯成了拥有一半苍蝇基因的蝇人......
还是放，他不管了，也管不了了。
一时摆完，又拿了许多靠枕和枕头来，紫茄招呼大家上炕坐，这炕下午烧起来的，热乎乎的。
Vocabulary Introduction:
皮博迪是一条与众不同的小狗，它拥有绝伦无比的高智商，因此注定拥有迥异于同类的“狗生”。它持有哈佛学位，成功开发了新能源，圆满解决地缘政治，还创立了属于自己的公司。皮博迪偶然机缘下收养了和它有着类似经历的人类小孤儿舍曼，它如同慈父一般悉心教育着他的儿子，并利用自己开发的时光机带舍曼回到未来每一个重要时刻，亲身经历书本上枯燥的历史事件。转眼舍曼到了上学的年龄，他丰富的历史知识得到老师表扬，却也引来高傲的小姑娘佩妮·彼得森的嫉妒和欺负。舍曼和佩妮的冲突使皮博迪陷入前所未有的艰难境地，为了保住对舍曼的抚养权，它想尽办法取悦佩妮的父母和相关机构负责人。
