For example, I like to define four types of developer tests in my Ant builds: unit, component, system, and functional.

例如，在我的Ant构建中，我喜欢定义四种类型的开发者测试：单元、组件、系统和功能。

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This method is based on integration of existing components, and this integration process consists of four steps: component evaluation, component adaptation, component assembly and system evolution.

该方法的开展通过集成已存在的构件进行，可以分为构件的评选、构件适配、构件组装、系统演化四个阶段。

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Then, we will present an instance about the modeling system of wire netting in Chapter Four, which is based on component technology.

在第四章节本文给出了基于组件技术实现的电网建模系统的实例。

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