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C) Metaphors of everyday life. Use some real-life examples to illustrate the so-and-so pattern, which can enable you to quickly grasp the purpose of a certain pattern and the structure of the implementation code. At the same time, you should realize that this metaphor is like telling you (2 +3) 2=22+2*2*3+32. You need to draw an analogy and come to (a + b) 2=a2+2ab+b2. The concrete application of the model in practical work is equivalent to the application of algebraic formulas.李亚升被人追赶，躲进了富顺茶室，茶室老板仗义相救，亚升得以脱身。两家人由此引发了很多爆笑的故事。The "Special Provisions on Labor Protection for Female Workers" clearly stipulates that female workers enjoy 98 days of maternity leave, of which 15 days can be taken before childbirth. In case of dystocia, maternity leave shall be increased by 15 days; For those who have multiple births, the maternity leave will be increased by 15 days for each additional baby.Public interface Handler {Russia: 3,100,000　　叶雨临走留言和他约定如果两年之内他能找到她，她就会做他的挚爱和妻子。西门虹在山风中狂追，手中的纸条随风飘走，而纸条背面正是女孩留下的电话号码……Good book!