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Singleton mode: It solves the problem of the number of instantiated objects, such as factories and object pools in abstract factories. Except Singleton, other creative modes solve the coupling relationship brought by new.Understanding Enhanced Module Patterns正闹着。而此时王皇后的妹妹心儿正遇见此生的良人裴少卿，江湖儿女一见钟情，决定即刻成婚，就在新婚当日，心儿看到了王皇后被废的公告，想起过去种种恩情，决定放弃婚姻，潜入后宫营救。Another expression of the minimum knowledge principle is to communicate only with direct friends. As long as there is a coupling relationship between classes, it is called a friend relationship. Coupling is divided into dependency, association, aggregation, combination, etc. We call classes that appear as member variables, method parameters, and method return values direct friends. Local variables and temporary variables are not direct friends. We require unfamiliar classes not to appear in the class as local variables.郑氏和张槐听了都点头，田夫子在诗词曲赋方面的造诣极高，请他帮忙自然妥贴。