要确保有一组组件可以支持一个应用程序的所有现有功能，这常常是组件开发的第一个层次。
Ensuring you have an array of components that can support all the existing functionality of an application is often the first tier of component development.
这张图与ewa框图有一些类同之处是毫不奇怪的；在最高的层次上，任何健壮的应用程序框架都必须提供这些功能。
It should not be at all surprising that this picture bears some resemblance to a block diagram of EWA; at the highest level, any robust application framework must provide these functions.
这个问题的实质是应用程序的适用性，因为它涉及到两个层次的设计：功能和美学。
This is a question that strikes at the heart of the usability discussion, because it involves design at two levels: function and aesthetics.
对Rails模型进行单元测试，然后通过功能测试和集成测试在更高层次上确保 Rails应用程序符合设计预期。
Unit tests test the Rails models, while functional and integration tests ensure the Rails application works as designed at a higher level.
找到应用程序中有没有考虑到的重要功能或隐含功能是需要很大努力的，这能揭示出在软件开发过程中存在深层次问题。
It may take serious effort to determine if an application has significant unexpected or hidden functionality, and it could indicate deeper problems in the software development process.
找到应用程序中有没有考虑到的重要功能或隐含功能是需要很大努力的，这能揭示出在软件开发过程中存在深层次问题。
It may take serious effort to determine if an application has significant unexpected or hidden functionality, and it could indicate deeper problems in the software development process.
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