为了达到渐进增强的目标，这是最简单方式。
Given the goal of progressive enhancement, this is the easiest path.
一般来说，环境协定要取得成功，就必须有一个广泛的框架、明确的目标和循序渐进的执行办法。
In general, successful environmental agreements require a broad framework, clear targets and a gradual approach to implementation.
通常这些资源以不同方式记录方法，但是多数是通过在常见情况中以一种特定实现具体开发目标的方式提供逐步渐进的解释来描述开发方法的。
These sources usually document methods in different ways, but mostly by providing step-by-step explanations for a particular way of achieving a specific development goal under general circumstances.
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