UML is a unified symbol language. It is a standard modeling method in the object-oriented system, and is the most widely used.
UML是一种统一的符号语言，是最广泛使用的面向对象系统的标准建模方法。
UML is a unified symbol language. It is a standard modeling method in the object-oriented system, and is the most widely used.
UML是一种统一的符号语言，是最广泛使用的面向对象系统的标准建模方法。
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