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然众人都还不死心，隔日还问。关系到汉国生死存亡的大事，谁敢轻易说话？谁又有什么妙计呢？沉默了许久，刘邦脸上有些挂不住了，眼神之中掩不住地有些失落。在遥远的格博特朗行星，正发生一场机器人之间的大战。这些机器人具有可变形成为交通工具或者武器的功能，而如今他们赖以生存的能源正日渐枯竭。这一刻，对立许久的对穿肠和唐伯虎，忽然同时啵起了嘴。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:她就不能收了，必须要还回去。Lins Concubine 02