首先您需要了解的概念是等价类。
The first concept that you need to understand is the equivalence class.
类是域中的一个概念。
版本5.3还引入了限制类的概念。
每一个类映射到一个基本的RDBMS概念上，同时也映射到一个jdbc类上。
Each class maps onto a basic RDBMS concept as well as a JDBC class.
“mixin类”是个有趣的概念，也常常是个很好的设计选择。
A "mixin class" is an interesting concept, and is often a good design choice.
在驱动程序部分，首先介绍了设备类规范的概念和设备类驱动程序的概念。
On the part of driver, it introduces the concept of facility criterion and facility driver.
每个类的属性描述了各种特性和控制的概念。
Properties of each class describe various features and attributes of the control concept.
面向对象的概念：它是可能的更新的一个实例化的对象的类？
OOP concept: is it possible to update the class of an instantiated object?
所谓的“爱情保险”不过是炒作概念罢了，并不能使客户保障情感类的风险。
The so-called "love insurance" is just playing concept and it cannot prevent emotion risks.
表示针对概念模型的对象查询的结果的基类。
The base class for the results of an object query against a conceptual model.
在此基础上分析四类资源之间的关系，建立概念模型。
Finally, the relationship of the four assets is analyzed and conceptual model is built.
本文提出了一类新的区组设计———差集偶的概念。
A special class of difference set pairs is equal to the perfect binary arrays pairs.
本文提出了一类新的区组设计———差集偶的概念。
A special class of difference set pairs is equal to the perfect binary arrays pairs.
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