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想抓犯人，却抓到爱人！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:However, super pilots need to fly safely for at least 1480 hours and have the capability of non-multi-weather conditions and multi-aircraft.　　该片是一部讲述在电影拍摄现场，穿梭于摄制组之间的超自然实体的登场，以及随后发生的一系列古怪状况的题材电影。该电影融合了恐怖电影的紧张感和喜剧要素，让人倍感期待。为了打造一款创新的性爱应用程序并赢得一场科技竞赛，一个性经验不足的学生和她的朋友们必须探索令人生畏的亲密世界。尹旭笃定了这一点，所以才敢这么做的。Baidu, a dog day, said that the content I sent was illegal. Let me take a screenshot of it.