求翻译：用于描述系统的静态结构。不仅定义系统中的类，表示类之间的联系如关联、依赖、聚合等，也包括类的内部结构（类的属性和操作）。类图描述的是一种静态关系，可以直观的了解一个系统的体系结构，在系统的整个生命周期都是有效的。　是什么意思？

Used to describe the static structure. Not only defined the class system, said between classes such as correlation, dependent polymerization, including the internal structure of the class (class attributes and operations). The class diagram describes a static relationship, intuitive understanding of

Used to describe the static system structure. Not only define the class in the system, said that the link between such as associations, dependencies, aggregation, and so on, are also included within the class structure (the properties of the class and operation). Class diagrams describe a static rel

Uses in describing the system static structure.Not only in the definition system kind, expresses class the between relation like connection, the dependence, the polymerization and so on, also includes the kind of internal structure (a kind of attribute and operation).The kind of chart description is

Used to describe the static structure of the system. Not only define classes in the system, contact such as associations, dependencies between classes, aggregations, and also includes the internal structure of a class (the class attributes and operations).　Class diagram describes a static relationsh

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