The CDA Viewer application that I built follows the same pattern, although I broke my transformation layer into three files for readability (see Download).
我构建的CDA Viewer应用程序遵循相同的模式，但是为了可读性，我将转换层拆分为三个文件(参见下载部分)。
The outer layer of skin is made up of fibers woven in a three-dimensional pattern that acts like a sponge.
皮肤表层是由纤维以三维模式交织构成，起到了海绵一样的作用。
The framework we'll create is a simple 3-tier framework that processes business logic using three patterns: the 3-layer architecture pattern, the Singleton pattern, and the Command pattern.
我们将要建立的是一个简单的3-tier框架，它使用了三种模式处理业务逻辑：3-layer 体系结构模式、 Singleton模式和Command模式。
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