One of the primary enablers of emergent design is the ability to see and harvest idiomatic patterns: processes, structures, and idioms that repeat in nontrivial ways within your code base.
紧急设计的一个主要推动者是发现和积累惯用模式的能力：在代码库中大量重复的流程、结构和惯例。
According to a study conducted by Forrester Research, three of four factors most likely to drive repeat visitors to a web site were design related: ease of use, download time, and freshness.
根据Forrester Research（一家电子商务领域的专业调查公司）的调查显示，引来回头客的可能因素中，四分之三都和设计相关：使用的便捷性，页面下载的时长以及新鲜感。
The key points of the design under the restrained conditions, such as orbit node period, regressive cycles, regressive period, repeat period and others, were also presented.
并给出了在轨道交点周期、回归圈数、回归周期、重复周期和其他因素等约束条件下的轨道设计要点。
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