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Therefore, learning design patterns, The first thing to do is to understand which aspects of design patterns are available to developers, Then, the principle, timing and method of each design pattern are studied respectively, that is to say, under what circumstances should a certain design pattern be used? When understanding the timing of a certain design pattern, it is also necessary to understand what consequences will be caused if this design pattern is not used at this time. After understanding the principle and usage of each pattern, more importantly, learning the object-oriented thinking mode, after mastering the object-oriented thinking mode, looking back at the design pattern, you will have a deeper understanding. Finally, learning the design pattern, you must study hard and practice more. "I agree with the last sentence very much."【播报】关注起点读书，获得515红包第一手消息，过年之后没抢过红包的同学们，这回可以一展身手了。苏州府任家世袭苏州织造行领织职务，拥有祖传的缂丝秘技。家主任雪堂从不插手家族生意，只爱研究诗书字画。任夫人沈翠喜不但刺绣了得，更善于经营管理，是任家真正的当家主母。任、沈二人成婚多年，任雪堂却始终难忘昔日恋人曾宝琴，欲将其接回任家，却不料因追捕水匪而发生意外，下落不明，让任家陷入重重危机。沈翠喜默默担负着挽救任家的重任，幸有曾宝琴相助，在经历了千万坎坷挫折后，终于洗清冤屈，回归往日的平静。8-1 Message: Write a function called display_message (), which prints a sentence indicating what you learned in this chapter. Call this function to confirm that the displayed message is correct. ?Under the guidance of these three points, writing classes and programs began to "design" ^ _ ^.当魅力四射的高智商美女Freddy与脆弱且富有同情心的前儿童兵Baba相遇，欲望点燃了彼此心中的黑暗，将他们变成了一对危险的杀手搭档。与此同时，对犯罪心理的罪责观念有着巨大分歧的DS Lola Franks和DI Jackson Mendy被指派共同侦办此案。一场有关性吸引力与情感操纵的猫鼠游戏就此拉开。Flowers not only attract pollinators with color and smell, but also quietly guide insects who are too shy to know what to do because they land on flowers for the first time. There will be a white route on the petals of grassland geranium to guide insects into the center of flowers and find nectar. In this process, the wings of insects will be more or less glued with precious pollen of stamens. The flowers of alpine Pulsatilla and strawberry flowers have white petals on the outside and yellow stamens in the middle. This change in color depth will highlight the stamens and allow insects to fly to the middle of the flowers without hesitation.