Built upon this is the concept of a module lifecycle and a service model.
在此基础上应用了模块生命周期和服务模型的概念。
Each of the two has its own distinct lifecycle model.
两个过程有各自截然不同的生命周期模型。
Figure 2: Spiral model of the software development lifecycle
图2：软件开发生命周期的螺旋模型
Figure 2: Spiral model of the software development lifecycle
图2：软件开发生命周期的螺旋模型
应用推荐