By designing test cases based on class descriptions , one is able to test the system at a deeper level 通过设计基于类描述的测试用例，一个人能够在较深的级别上测试系统。
Class descriptions with the same set of method pointers constitute a metaclass ? class descriptions are objects , too 有着同一组方法指针的类描述构成一个元类? ?类描述也是对象。
Objects point to their class descriptions which , for the most part , contain pointers to dynamically linked methods 对象指向它们的类描述，后者大多包括了指向动态连接方法的指针。
Are sometimes used interchangeably , but in fact , classes describe the structure of objects , while objects are usable “类”和“对象”这两个术语有时互换使用，但实际上，类描述对象的“结构” ，而对象是类的可用“实例” 。
The subclass always includes the superclass and defines a pointer to the class description and to the metaclass description if there is a new one 子类总是包含了基类，还定义指向类描述的指针以及指向元类描述? ?如果有新的的话? ?的指针。
Lengthening structures is what we called inheritance , i . e . , we discover that class descriptions with the same set of methods form a class , and that there is inheritance among the classes of class descriptions 扩展结构就是我们所说的继承，就是说，我们发现同样一组方法的类描述形成一个类，并且类描述构成的类之间有继承关系。
Storing the methods in this fashion has a few consequences : if no class con ? structor is interested in a selector , a selector / method pair is silently ignored , but at least it is not added to a class description where it does not belong 以这样的方式存储方法有几个后果：如果类构造函数对选择器不感兴趣，它就忽略选择器/方法配对，不过至少选择器/方法不会被加到它所不属于的类描述。
Lingo is based on lsa theory and gets latent concept used for clustering description from search summarization . it constructs the related matrix of term , phrase and summarization , and makes singular value decomposition and similarity computation . this thesis implements web page on - line clustering 该聚类算法基于潜在语义分析理论,利用检索结果的摘要进行潜在概念的获取并作为聚类描述,通过词、短语、摘要构建相关矩阵,进行奇异值分解和相似度计算,实现了网页在线聚类。
Object oriented programming and visualization technologies are adopted in the program of this paper . in designing program , many formulas , curves and charts used in calculations have been completed . the great part of parameters , such as the enthalpy of gas and air , are described by the class method 对大部分的热工、阻力方面的参数，如烟气和空气的焓值、热物性参数和阻力系数等的计算，采用了类描述即面向对象的方法，使得无论是调用还是修改这些参数的计算方法，都显得十分方便。
The author studies some important domain analysis methods in the world . because of the virtues of foda method , the paper researches over am / fm / gis domain with the foda method , tries to plot out the boundary of am / fm / gis domain , extracts the domain features of am / fm / gis , and gains am / fm / gis domain model , including domain structure model , context feature model , operational feature model , representation feature model , information model , and activity model . these models are expressed in uml modeling methods , class description language , and tree view diagram 论文在分析了众多国内外领域分析方法的基础上，选择foda方法对am fm gis领域进行深入研究，界定其领域边界，抽取出am fm gis领域特征，得出了am fm gis领域结构图、场景图、特征模型、信息模型和操作模型，并采用多种uml建模方法、类描述语言、树状图等表达方式对相关模型进行描述，并在此am fm gis领域模型的基础上探讨了领域设计与实现。
