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8. Improve the model or design a new model according to the analysis;一只橘红色的狐狸遇到了一条睁不开眼睛的狗，为了憧憬的人类生活，一起完成一场城市大冒险！Ryan O’Connell主演的Netflix喜剧《#非同凡响# Special》因中了加州税务减免，故此获Netflix批准制作8集第二季。他转望俞大猷。好了，拜托你们了。慕容雲海、端木磊、上官瑞謙和葉爍是艾利斯頓的四大貴族子弟，個個陽光帥氣，成為全校女生熱捧的偶像。這四個少年不滿足於父母安排的生活，不願就讀艾利斯頓，一心想讓校長開除自己，於是合謀了種種惡作劇，成為令校長頭痛的H4組合。草根出身的楚雨蕁是個品學兼優的高三女生，她最大的夢想就是能入讀有名的貴族大學艾利斯頓學院。雨蕁的舅舅雪村借錢，把雨蕁送進艾利斯頓，雨蕁由於替人打抱不平而成為H4欺凌的對象，在較量和比拼中相互欣賞成為朋友，H4也為雨蕁的堅強自立所震撼，最終成為學校的四大優秀生。The next four patterns, including this pattern, are all the relationships between classes and do not involve inheritance. When learning, you should remember induction and the diagram at the beginning of this article. The observer mode is well understood, similar to email subscription and RSS subscription. When we browse some blogs or wikis, we often see RSS icons. This means that when you subscribe to the article, you will be notified in time if there are subsequent updates. In fact, in a nutshell, when an object changes, other objects that depend on the object will be notified and will change with it! Objects are a one-to-many relationship. Let's look at the diagram first: