说明：  一个数学模型以及定义在此数学模型上的一组操作。抽象数据类型需要通过固有数据类型(高级编程语言中已实现的数据类型)来实现。抽象数据类型是与表示无关的数据类型，是一个数据模型及定义在该模型上的一组运算。对一个抽象数据类型进行定义时，必须给出它的名字及各运算的运算符名，即函数名，并且规定这些函数的参数性质。一旦定义了一个抽象数据类型及具体实现，程序设计中就可以像使用基本数据类型那样，十分方便地使用抽象数据类型
(A mathematical model and a set of operations that define this mathematical model. Abstract data types need to be implemented by inherent data types (data types that have been implemented in advanced programming languages). Abstract data type is a data type independent of expression. It is a data model and a set of operations defined on the model. When defining an abstract data type, it must give its name and the operator name of each operation, that is, the function name, and specify the parameter properties of these functions. Once an abstract data type and specific implementation are defined, an abstract data type can be used very easily in the program design, as the basic data type is used.)