介绍了J2EE架构的概念、内容和特点及其主要技术。
It also introduces concept, content, characteristic and main technology of J2EE frameworks.
它们由于所处的历史阶段不同，因而在内容和特点方面存在很大的差异。
Because of the different historical period, they have very big difference in contents and characteristics.
介绍其主要内容和特点，并对其中八条原文的临床指导意义作简要评述。
This paper introduces its main contents and features and makes some comments on eight original items in terms of their clinical significance.
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