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However, for death caused by chronic diseases or aging, the course has certain regularity, in which some signs of death can be identified and some can be perceived by oneself.而且从当时的种种迹象表象，尹旭完全可以于此时脱开关系。：剧中游戏“阿尔法之境”将战队分为两种类型，一种是实力超群、为荣誉而战的战斗型战队，队员们各个身怀绝技并肩负着跨服战的重任；另一种则是女主所在的服务型战队，作为“老油条”的他们不仅在游戏中饰演“清道夫”更是帮助普通玩家在虚拟游戏中实现他们曾经不可能完成的梦想和任务，努力成为完美的配角担当，从而在配角的位置中找到...From the above command class code, we can see that any operation has an execute method to perform the operation. The above code uses traditional object-oriented programming to implement the command mode. The procedural request call of the command mode is encapsulated in the execute method of the command object. Have we found the above writing code a little cumbersome? We can do this using the callback functions in javascript, In object-oriented, The receiver of the command mode is saved as an attribute of the command object, and the command execution operation is agreed to call the command.execute method. However, if we use the callback function, then the receiver is closed in the environment where the callback function is generated, and the execution operation will be simpler. Only the callback function can be executed. Let's look at the following code:128-132