Basic conception and main characteristic of software design pattern is introduced.
介绍了软件设计模式的基本概念和主要特点。
The basic concept of software risk is introduced, the characteristic of software risk and the ways to distinguish software risk are analysed.
首先介绍了软件风险的基本概念，分析了软件项目风险的特点，以及如何识别软件风险。
Symbian is a characteristic example of a software platform.
Symbian就是一个软件平台的典型例子。
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