为了满足新的需求，设计也在不断演化，关键对象承担着各种模式角色，直到它们变得难以使用或者难以修改，最终不得不重构或者重写系统。
As the design evolves to meet new needs, key objects are loaded with pattern roles until they become hard to use or hard to change and the system has to be refactored or rewritten.
文中以系统论的观点总结了台地相与槽盆相的差别及各相之间的关系，建立了二叠纪至早三叠世平果台地沉积体系之演化模式。
According to the viewpoint of system theory, the difference between platform facies and trough facies, and the influnece among them are summarized, and their evolution model is found in this paper.
文中概述了青藏高原基本构造格局、青藏高原多岛弧盆系统洋陆转换演化模式。
This paper has dealt briefly with the basic structural framework, and the marine-land transfer and evolutional model of the archipelago arc-basin system of the Qinghai-Tibet plateau.
根据功能设计的思想，采用自顶向下模式，给出一个并行协同环境下注塑模具装配设计系统的框架，对功能至产品演化过程中的数据模型进行了分析。
Based on the idea of function design, an architecture of the assembly design system for injection mould in concurrent and collaborative environment was presented using top down pattern.
运用非平衡系统理论，分析了海洋经济复合系统持续性演化模式及实现的途径。
With the theory of unbalanced system, it analyses sustainable evolution pattern and realization path of ocean economic complex system.
作者通过构建离散元模型，模拟主动底辟盐构造断裂系统的演化过程，并进一步讨论了岩性强弱对于主动底劈盐构造断层系统分布模式的影响。
The authors built a discrete element model to simulate the evolution of fault system above active salt domes, and further discussed the influence of rock strength on fault patterns.
模式演化是OO系统中一个很关键的问题。由于OODB的应用具有动态特征，因而模式要经常改动。
Schema evolution is a key problem in object-oriented systems because the dynamic nature of typical OODB applications calls for frequent changes in the schema.
模式演化是OO系统中一个很关键的问题。由于OODB的应用具有动态特征，因而模式要经常改动。
Schema evolution is a key problem in object-oriented systems because the dynamic nature of typical OODB applications calls for frequent changes in the schema.
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