Chapter 6 Software Engineering 6.1.1 The Cycle as a whole Regardless of why software enters the modification phase the process requires that a person(often not the original author) study the underlying program and its documentation until the program, or at least the pertinent part of the program, is understood. Otherwise, any modification could introduce more problems than it solves. Acquiring this understanding can be a difficult task even when the software is well-designed and documented. In fact, it is often within this phase that a piece of software is finally discarded under the pretense(too often true)that it is easier to develop a new system from scratch than to modify the existing package successfully 不管因为什么原因软件进入了修改阶段,这个过程需要人们(通常不是原 始的作者)研究程序及其文档,直到程序或者至少是相关部分的程序能够 被理解。否则,任何的修改将导致比它所解决问题还要更多的问题出现 即使软件有优秀的设计和齐备的文档,理解也是一个很困难的工作。事实 上,常常是在这个阶段,一个有用的软件片段最终就被放弃了(常常是这 样),而开发一个新的系统比成功地修改现有软件更容易。 计算机专业英语 68Chapter 6 Software Engineering 计算机专业英语 6-8 6.1.1 The Cycle as a Whole Regardless of why software enters the modification phase, the process requires that a person (often not the original author) study the underlying program and its documentation until the program, or at least the pertinent part of the program, is understood. Otherwise, any modification could introduce more problems than it solves. Acquiring this understanding can be a difficult task even when the software is well-designed and documented. In fact, it is often within this phase that a piece of software is finally discarded under the pretense (too often true) that it is easier to develop a new system from scratch than to modify the existing package successfully 不管因为什么原因软件进入了修改阶段，这个过程需要人们（通常不是原 始的作者）研究程序及其文档，直到程序或者至少是相关部分的程序能够 被理解。否则，任何的修改将导致比它所解决问题还要更多的问题出现。 即使软件有优秀的设计和齐备的文档，理解也是一个很困难的工作。事实 上，常常是在这个阶段，一个有用的软件片段最终就被放弃了（常常是这 样），而开发一个新的系统比成功地修改现有软件更容易