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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."Four, the setting and the actual effect do not conform to the朱珠和王旺一家住在西北地区的沙漠边上，为了治沙，朱珠和王旺一家人开始植树。他们冒风沙、抗烈日，肩扛人拉运树苗，一桶一桶挑水灌溉，每天往返数十里。持之以恒数十年，他们的辛劳初见成效。然而王旺不幸患了骨癌，不久就去世了。朱珠面对如此打击并没有屈服，她继续带领一家老小植树治沙，凭着不屈不挠的精神，将万亩不毛之地变成了绿色的海洋。从关中到江东万里迢迢，路途凶险，万一要有个意外，还真有些棘手。Dye wood will not harm any insect in the process of reproduction. It will even dedicate its noble yellow petals to this "love game". This kind of flower will attract huge wild bees, and nectar can only be found by colliding with the entrance. During the intense friction, the wild bees were covered with pollen.安琪媛出生在一个平凡的大家庭里，因为母亲去世的早，父亲安向东带着她同姥爷梁永顺和姥姥潘素芬生活在一起。姥爷梁永顺和姥姥潘素芬坚守着一家祖传的面条老作坊，除了大女婿安向东偶尔帮衬着老两口打理这间老作坊，其他子女都在外工作，对老作坊的手艺和生意丝毫不感兴趣。安琪媛个性乖巧懂事，但她一直不被财大气粗的婆婆林秀琴接受，她与丈夫林天佑的婚姻也被婆婆林秀琴不断破坏。安琪媛在一系列误打误撞中与大财团董事长之子齐霁结识，并屡屡得到齐霁的帮助。然而齐霁的善良也被安琪媛的婆婆林秀琴利用，让林天佑陷入对妻子安琪媛的种种误会中，两人的婚姻濒临破裂。传承三代的梁家食品老作坊濒临倒闭，年迈力衰的梁永顺和老伴潘素芬为劝说儿女们回来继承家业，无奈生出一计，称有巨额家产。所有儿女果然纷纷归来。他一直拖到一九四九年五月初才坐上去香港的轮船，算得上真正的末班车。没有人知道他在拖什么或等待什么，我想他自己也未必知道，不过是下意识的拖延。不久他就死在香港，死前再没有值得记述的事件或说过的话，他基本没再说话，这没什么可奇怪的，一切都不值一提，他终于走向自己的沉默。