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Define a factory interface. Q: How will it be realized? A: Declare a factory abstract class科研潜艇“逗号”，是科幻小说《地心游记》的铁杆粉丝。为研究海底神秘物质, 跟着叔叔地质学家 “铁石号”深潜马里亚纳海沟，意外被卷入洞穴迷宫来到巨大未知世界并发现远古生物，开启了超乎想象的海底地心探险。1. The user accesses a form page.静海是一座坐落在月球静海撞击盆地内的月海。孔侑&裴斗娜有望主演Netflix反乌托邦科幻惊悚新剧《静海》！郑雨盛担任制作人,改编自2014年同名科幻短片,讲述未来世界遭遇沙漠化危机,缺乏食物和水资源,精明强干的队长（孔侑饰）带领精锐队员们飞往废弃的月球基地回收神秘样本。《母亲》编剧朴恩乔执笔,短片导演崔项勇继续执导,预计8月开拍,本剧共8集。For example, if we want to implement a JS function, Such as form validation, Then if we don't use the policy pattern in javascript described in the previous chapter to solve the form validation encapsulation code, It is a temporary form validation function written by itself. Certainly without any encapsulation, Then at this time, we will pop up a prompt to the user for whether the two values are equal. If there is a form verification on another page, their judgment method and business logic are basically the same, but the comparison parameters are different. Should we consider writing a form verification code again? So now we can consider using the template method pattern to solve this problem. Common methods are extracted, and different methods are implemented by specific subclasses. This design code also has the advantages of stronger scalability and better code ~According to the memory of Liu Guangyuan, a soldier who personally participated in the battle that year:根据畅销书“ DerÜberläufer”改编，讲述了一个二战德国国防军士兵的故事，他经历了第二次世界大战的疯狂，并逃往红军