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In addition, 10,000 hours is not a promise that can be fulfilled. Some people misunderstand that one can definitely become a master after "10,000 hours". This is a misunderstanding. The real meaning is that all masters and masters must go through a long period of training and will not master XXX in 21 or 30 days. This is the difference between a necessary condition and a sufficient condition.1961年夏， 艾米尔·黑尔贝格刚刚从军队退役复员。 他来 到了位于巴伯斯贝格的DEFA电影公司：这是一个充斥着无尽的魔幻感和极富创造性的乐观主义的地方。在一扇巨大的拱门后面，他看到了历史悠久的被称为“梦工厂”的电影公司。他的哥哥亚亚历山大在这家公司的置景组工作， 他给艾米尔谋到了一份差事。虽然艾米尔对电影行业知之 甚少，但因为他还没有任何对未来的规划，便勉强接下了 差事。然而，当他为一部电影做群演时，他遇见了一位名 叫米露的法国舞者，一切开始发生变化......众人生怕有变，不敢停留，纷纷连夜逃离。For example, now let's add teammates to the game. For example, there are 6 heroes in a group, then there are teammates and 3 enemies in this case. Therefore, we need to distinguish whether the enemy or the teammate needs the color field of the team. If the color of the team is the same, then it is the same team, otherwise it is the enemy.恨不能掏心掏肺表达仰慕之情。If there is an activity instance in the application in singleTop, singleTask, singleInstance, and the startActivity (Intent intent) returns to the activity again, since the activity does not recreate the activity but reuses the instance in the stack, the activity does not call onCreate, onStart, but directly calls onNewIntent (Intent intent) function after obtaining the focus again;For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.