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Although there are subclasses in java that implement the interfaces of the parent class, But I think javascript can be different from java, It is possible that the parent class in java is an empty class, Subclasses to implement the interface of the parent class, in javascript, I think the common code is completely written in the parent function. If the business logic needs to be changed in the future, or new business logic is added, we can completely use subclasses to rewrite the parent class, so the code has strong scalability and is easier to maintain. Since I am not a professional java, please understand if there is any mistake in describing the knowledge points in java ~ ~　　他们租用桃园酒家为据点，由此开展了惊心动魄、悲壮的杀鬼子复仇行动，以各种灵活巧妙的方式、方法，杀得日本鬼子心惊胆寒。在以岳明华政委领导下的八路军游击队的感召教育下，他们逐渐明白要想彻底战胜日本侵略者，必须在共产党的领导下，广泛团结民众，有思想、有组织、有纪律开展人民战争。你们好心放他一条生路，可是他自己没福气，也不能怪人。主要讲述一位父亲为救女儿，与为长生不老需要彼此的器官的两个克隆人之间发生的悬疑惊悚故事。千真万确，我们还有人守在后门口呢，就怕他们跑了。《消失的初恋》是一部以高中男女生之间的误会为开端的浪漫喜剧。青木想太是一个略显笨拙的少年，单恋着邻座的女孩桥下。有一天，青木从桥下那里借来一块橡皮擦，却看到上面画着一颗心，还写着同班男生井田的名字。然而，橡皮擦又被井田看到了并误以为这是青木的物品，以为青木喜欢自己……忠孝节义四个单元主题，分别为：忠─万古留芳；孝─孝感动天；节─断机教子；义─路遥知马力。