求翻译：软件具有可运行的行为特性，在写出程序代码并在计算机上试运行之前，软件开发过程的进展情况较难衡量，软件质量也较难评价，因此管理和控制软件开发过程十分困难；软件质量不是根据大量制造的相同实体的质量来度量，而是与每一个组成部分的不同实体的质量紧密相关，因此，在运行时所出现的软件错误几乎都是在开发时期就存在而一直未被发现的，改正这类错误通常意味着改正或修改原来的设计，这就在客观上使得软件维护远比硬件维护困难；是什么意思？

Software can be run with the behavior in writing code and test run on your computer before the software development process more difficult to measure progress, software quality is difficult to evaluate, so the management and control software development process is very difficult; Software Quality no

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The software has the behavior characteristic which may move, in writes the procedure code and tries before the movement on the computer, the software performance history progress situation is difficult to weigh, the software quality is also difficult to appraise, therefore the management and the con

Software has may run of behavior characteristics, in writes program code and in computer Shang try run zhiqian, software development process of progress situation more difficult measure, software quality also more difficult evaluation, therefore management and control software development process is

Software has may run of behavior characteristics, in write program code and in computer Shang try run zhiqian, software development process of progress situation more difficult measure, software quality also more difficult evaluation, so management and control software development process is difficu