It is throughout the maintenance phase that the software evolves the most.
软件的演进主要发生在整个维护阶段。
For example, you may need to make design changes or change the planned test sequence as the software evolves.
比如，在软件进化的过程中你可能需要对设计或是计划的测试序列做出更改。
From mapping sites to social networks, web-based software evolves much faster than desktop software, which often looks old-fashioned by comparison.
从地图网站到社交网站，网络软件的演进要比桌面软件速度快得多，相比之下，桌面软件显得过时淘汰了。
The basic idea behind open source is very simple: When programmers can read, redistribute, and modify the source code for a piece of software, the software evolves.
开源背后基本理念非常简单：如果程序员可以读，可以再发布，并且可以修改一个软件的源代码，那么软件就能得到进化。
The basic idea behind open source is very simple: When programmers can read, redistribute, and modify the source code for a piece of software, the software evolves.
开源背后基本理念非常简单：如果程序员可以读，可以再发布，并且可以修改一个软件的源代码，那么软件就能得到进化。
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