The EJB specification is mature, yielding the benefit of well-known design patterns, case studies, and best practices, as well as a rich set of vendor-supported development tools.
EJB规范比较成熟，因而有许多优势：众所周知的设计模式、案例研究和最佳实践，还有丰富的供应商支持的开发工具集。
Studies reveal the most costly aspects of software development and maintenance: change analysis, design, and testing.
研究表明，以下方面是软件开发和维护中开销最大的方面：变更分析、设计和测试。
All of this leaves JDO developers and architects with few proven design patterns or case studies to guide their JDO development efforts.
所有这些现状使JDO开发人员和架构设计师几乎没有已经实践证明的设计模式或案例研究来指导他们的JDO开发工作。
All these studies provide gist for doing the insert groove optimization design and the development of three-dimensional complex groove turning insert which has independent knowledge property right.
以上研究为进行刀片槽型优化设计及具有自主知识产权的三维复杂槽型车刀片产品的开发提供了依据。
He is an experienced tunnel advisor with both technical knowledge of development of projects from feasibility studies, to tender strategies, detailed design and construction issues.
他是一位有经验的隧道顾问，既有开发方面，也有从可行性研究到招标策略、详细设计和施工问题等项目方面的技术知识。
The last chapter looks ahead to the development of direction sign system design based on relevant theories and case studies.
最后第四章是基于理论和实例研究对未来对导向标识系统设计发展趋势的展望。
These studies point the way to detailed understanding and provide some key information for vaccine development, although much remains to be learned to enable truly rational vaccine design.
这些研究为深入了解这个机制指明了方向，并为疫苗的研制提供了重要的信息，尽管尚有许多有待于进一步了解并最终能真正地设计出合理疫苗。
This paper studies the design and development of a PC based NC system for parallel Kinematic Machine (PKM).
研究了基于PC机的并联机床数控系统的设计和开发。
Some studies in design, advanced development, experiment for the steel-secondary plane linear induction motor were made.
对钢次级平面型直线异步电动机进行了设计、试制和试验。
PHA is most commonly used early in the development of a project when there is little information on design details or operating procedures; thus, it will often be a precursor to further studies.
PHA通常用于项目研发的前期，在此期间只有极少的关于设计说明或操作规程的信息。
This paper studies the relationship between the phone card's design in Shanghai and Shanghai regional culture, and the development trend of the phone card's design in Shanghai.
本文从海派文化与上海电话卡平面设计文化内涵、设计语汇的规律，探讨上海电信电话卡平面设计的未来发展趋势及解决现存问题的途径。
This paper studies the relationship between the phone card's design in Shanghai and Shanghai regional culture, and the development trend of the phone card's design in Shanghai.
本文从海派文化与上海电话卡平面设计文化内涵、设计语汇的规律，探讨上海电信电话卡平面设计的未来发展趋势及解决现存问题的途径。
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