每个平台在技术领域中都有自己的位置，在整个软件开发历史中都有自己相对流行的时期。
Each has its place in the technology landscape and each has enjoyed periods of relative popularity throughout the history of software development.
我们正在经历软件开发过程中一段剧烈活动的时期。
We're experiencing a period of intense activity in software development processes.
另一方面，软件开发的困难由来已久，但在不同的时期软件开发的困难突出于不同的方面。
On the other hand, the software crisis has emerged for a long time, but the difficulties of software developing are various in different periods.
另一方面，软件开发的困难由来已久，但在不同的时期软件开发的困难突出于不同的方面。
On the other hand, the software crisis has emerged for a long time, but the difficulties of software developing are various in different periods.
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