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3. Some types, such as the core trading engine of the exchange, control the trading process. If multiple types can be created, the system will be completely chaotic. (For example, if there are multiple commanders in an army who command at the same time, there will definitely be a mess), so only by using the singleton mode can the core transaction server independently control the whole process. The following is an analysis of some examples that we need to pay attention to when applying singleton pattern in the development process.她也不在意，只把眼光沿着胡敦、胡钧，一溜瞧下来。I like to use PyTorch library very much in computer vision competitions, and TensorFlow or Keras library will be used in natural language processing or time series competitions. When analyzing data, I will use SciPy library, science-learn and XGB are also very useful tools.The solution is to move the cursor to the end of the article, then click "Page Layout"-Page Setup-Separator-Continuous "and confirm.《大河小虾》系列剧以小孩的视角去观察社会，表现河南本土不同层次的人群在生活中所面对的酸甜苦辣、喜怒哀乐，以及在精神层面上所展现出的追求和梦想。很重要的一点便是团结，各路弱小的义军团结在一起，才有足够的力量与秦军相抗衡。天才理工男黄剑（张若昀 饰）与品学兼优的富二代许子聪（李现 饰）为争一个麻省理工学院知名物理学教授招录的名额，而成为明争暗斗的竞争对手。黄剑为达到MIT对社团经验的要求，不得不选择加入奇葩各异的淑媛社，也因此与想要挖掘劲爆素材而隐藏身份混入其中的菜鸟记者朱珠（马思纯 饰）相遇。在共同经历各种“奇葩盛事”后，两人逐渐从“冤家路窄”到“爱意萌动”， 展现“学霸与学渣”间奇特的万有引力，上演了一出笑泪交织的美好热恋。与此同时，其他成员也在这个过程中得到各自的成长。