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So-called peripheral functions, such as performance statistics, logging, transaction management, etc.Factory method: Create a single object, which is used in Abstract Factory.农村干部赵天亮忠于职守，大公无私为群众服务，真实地反映了新农村新面貌，展示了新农民新风采。Question: What do you think of Huang Dao's change of sweetheart Superman's trousers into skirts, while sad Superman did not have this treatment?国丈老爷说要找人，他们自然不敢说个不字，只能小心翼翼地护卫在侧。Let's first understand the column children that proxy objects are instantiated instead of ontology objects. For example, Jingdong CEO wants to give a gift to milk tea sister now, but if the CEO is embarrassed to give it, or has no time to give it due to busy work, then he wants to entrust his agent to do it at this time, so we can use the agent mode to write the following code:红椒跟紫茄则坐那安静地听着，两人小手握在一起，不时你捏我一下，我掐你一把，面上却一本正经，不见笑容。