In the example above , class b is effectively both b and a . when you access a b object , you can use the cast operation to convert it to an a object 在上面的示例中，类b既是有效的b ，又是有效的a 。访问b对象时，可以使用强制转换操作将其转换为a对象。
The conversion operation encodes the replacement fallback buffer instead of the original input character , then continues to process the remainder of the input 转换操作对替换回退缓冲区（而不是原始输入字符）进行编码，然后继续处理输入的其余部分。
Etl data transformation operations can be roughly classified into six groups or modules : data extraction , verification , cleaning , integration , aggregation , and loading Etl数据转换操作大致可以分为6个组或模块：数据的提取、验证、清理、集成、聚集和装入。
There seem to be some basic “ laws ” or conventions operating in the software area and in the software business that can help us to understand the nature of this activity 有某些基本的法则或在软件领域和软件业务中的转换操作能帮助我们自然的理解这些活动。
The conversion operation uses the replacement fallback buffer to emit a replacement string instead of a decoded character , then continues to process the remainder of the input 转换操作使用替换回退缓冲区发出替换字符串（而不是已解码字符） ，然后继续处理输入的其余部分。
As a rule , when engineer wants to change over the pneumatic manoeuvring system to the mechanical manoeuvring system or vice versa , the engineer must perform the change - over operation with the engine stopped 作为一个惯例，当轮机员要转换气动操纵系统到机械操纵系统或反过来转换机械操纵系统到气动操纵系统，轮机员必须在机器停止时进行转换操作。
Unix filters are combined using pipes to perform various operations on the information that flows through the pipe ; they perform logging operations , data conversion operations , and so on , on the data stream that moves through them Unix过滤器联合使用管道来执行消息上各种不同的操作，然后这些消息通过管道来“流动” ，他们在数据流上执行日值操作、数据转换操作等等。
This method is automatically called when you create data bindings in a rapid application development designer such as visual studio . you can also use it declaratively to simplify casting to a text string . to do so , you use the 尽管当您在应用程序快速开发( rad )设计器（如visual studio ）中创建数据绑定时会自动调用此方法，但如果希望简化到要在浏览器上显示的文本字符串的转换操作，则还可以以声明方式使用此方法。
This paper mainly describes the design of system and database , especially the method and theory of design . it discusses me c / s mode in detail , and explains the realization principle of my system . furthermore , the paper illustrates the structure of a bitmap - operation lib and detailedly discusses the principle of database backup and restore etc 本文介绍了系统的设计和数据库的设计过程，对设计过程中应用到的方法理论做了详细探讨；着重对系统采用的c s模式和数据库设计的方法原则做了的深入研究；论文后面论述了系统的实现原理和方法，对图像转换操作库painlib做了详尽分析和阐述，并对数据库的用户管理、备份和恢复等安全措施的原理进行了详细的讨论。
Programmer who accord to the structure composed of n - layers , which applies to dbms , can design code model including entity class , operating class and several web pages . then the xml document in terms structure of the database can be build . then the xsl conversion document based upon the code model and xml document can be designed 根据数据库应用程序开发中的n层架构,可设计架构中的实体类、操作类及多个数据库操作页面等源代码模型,并按照数据库及其表结构信息来生成xml文档,再根据源代码模型的要求和xml文档原型制定xsl转换文件,最后通过编写特定的程序控制转换操作,即可以自动生成所需要的源代码文件。
