3.3耦合（或者依赖）关系的种类： 零耦合（Nil Coupling）关系：两个类没有耦合关系 具体耦合（Concrete Coupling）关系：发生在两个具体的（可实例化的）类之间，经由一个类对另一个具体类的直接引用造成。
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insulating concrete coupling 绝缘联轴器
common concrete coupling beam 普通混凝土连梁
reinforced concrete coupling beams 钢筋混凝土连梁
reinforcement-concrete coupling corrosion 耦合腐蚀
steel reinforced concrete coupling beam 型钢混凝土连梁
concrete pump coupling 混凝土泵联轴器
concrete volute pump coupling 混凝土涡壳泵联轴器
concrete volutepump coupling 混凝土涡壳泵联轴器
T he similarities and differences oft he characteristics between block coupling beams and concrete coupling beams after strengthening by reinforcement have been compared.
对比了砌块连梁和混凝土连梁通过配筋加强后的相应特征的异同。
Therefore, there still has to be a system architect who decides where and in which form loose coupling is appropriate in a concrete project.
因而，在具体项目中还是应该由系统架构师来决定在哪儿、以哪种方式应用松耦合。
Tight Coupling: When a class is dependent on a concrete dependency, it is said to be tightly coupled to that class.
翻译：紧耦合：当一个类依赖于一个具体的依赖，也就是说这个类，是紧密耦合的类。
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