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……启明的书友自然不忿，立刻反击。The enhanced module pattern is used when it is suitable for those situations where the single column must be an instance of some type and some attributes or methods must be added to enhance it. For example, the following code:为平息遍布中华的抗清复明烈火,多尔衮派遣西王吴三桂、定南王孔有德、敬谨亲王尼堪 率领三路大军南下清剿,就在这时多尔衮劳累身亡。鳌拜手握大权,作威作福。中华大地，狼烟滚滚，试问天下，谁主沉浮？Is to define a main method calculate in the AbstractCalculator class, calculate () calls spilt (), etc. Plus and Minus inherit the AbstractCalculator class respectively, and implement the call to subclasses through the call to AbstractCalculator, see the following example:String exp = "2 +8";小鱼儿的武功不及花无缺，但是别忘了，这时小鱼儿身上还缠绕着那条剧毒无比的碧丝蛇。兵圣有东方兵圣与西方兵圣。东方兵圣就是《孙子兵法》作者孙武，而西方兵圣则是《战争论》的作者克劳塞维茨。作为兵书，《孙子兵法》比《战争论》早二千年，且后者又远远逊色于前者。电视剧《兵圣》，是以公元前560年前后的春秋时期为时代背景，围绕孙武、伍子胥、无咎等历史人物，描述了当时齐、楚、吴、越等各诸侯国的兴盛衰败，以塑造出主人公孙武作为一代兵圣的成长历程。