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争权夺利而已。B) Design principles. Many people have listed seven principles, such as single duty principle, opening and closing principle, Richter substitution principle, dependence inversion principle, interface isolation principle, composite reuse principle and Dimit principle. LSP, I elevated it to one of the three cornerstones of the object-oriented paradigm; Single responsibility and interface isolation are mainly used as the principle of responsibility division in object-oriented analysis/OOA, which you can not pay much attention to at this time. Relying on the inversion principle, I throw it away as garbage, because the opening and closing principle or directly "relying on abstract type principle" already contains the essence of relying on the inversion principle, while the dross of relying on the inversion principle is inherited by IoC. Of course, the pullback, I emphasize very much. Therefore, you need to master the abstract dependency principle (OCP), one-way dependency principle (including the learning of callbacks) and the minimum dependency principle (composite reuse principle, Dimit rule).阿列娜是个美丽的俄罗斯姑娘，她不但是人类历史和史前文明的专家，更是一个身手矫健的搏击专家和攀岩爱好者，经常受雇于各种基金会去全世界发掘和寻找史前遗迹。格林是一个以考古之名进行盗墓和文物走私的所谓“考古学家”，在一次意外中他发现了一个古代遗迹并从中解开了“世界末日”之谜。在遥远的古代地球上已经存在着一个高度发达的史前文明，他们预测到了未来人类将会有十分之一的人死于由太阳风暴而引发的“末日”灾难。为此，史前地球上的七个文明各自打造了一个具有神奇力量的护身符，只要有一个护身符最终流传到未来，就可以使全人类逃过大劫。然而，古人们低估了人性的贪婪和黑暗，格林教授将史前遗迹和末日灾难的研究成果出卖给了全球最大的军火组织，人类的灾难在这个组织的眼中却是趁混乱发财并进一步控制世界的大好机会，他们派出雇佣军在格林教授的带领下开始在世界范围内寻找另外六个史前文明的发明。Each member has a clear role and responsibility in the MDT team."Then you mean, in the subsequent battle with the" killer bee ", you still rely on the guns in your hands? If so, what effective means do you have to persist in fighting?" I asked.The end of the article is very imposing, with calm and courage regardless: