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这部英国迷你剧由3个各自独立的故事组成，彼此间并没有直接联系，但都以极端的黑色幽默讽刺和探讨了科技对人类生活产生的影响。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:在第五季首集中，Jeff回到了格林戴尔社区大学——因为他以前的律师搭档AlanConnor请求他收集一起诉讼案的相关证据。Pelton校长看到Jeff归来感到非常惊讶，他以为Jeff是来帮助他拯救学校，于是立即召集以前的学习小组碰头——这意外的重聚活动让Jeff又惊又喜……　　很快，天界魁拔司和地星神圣联盟均探测到了魁拔依然生还的“脉频”。因此，找到魁拔，彻底消灭魁拔，再一次成了各地热血勇士的终极目标。九国联盟就此发出征兵令，号召各地勇士参加联军，消灭魁拔。