The first part of the paper is devoted to a briefing and commenting on the several major existing infinite elements, with emphasis on their formation and range of application.
本文第一部分对已有的几种主要的无限单元进行介绍和评述，着重介绍这些无限元的形成和适用范围。
The first part of the paper is devoted to a briefing and commenting on the several major existing infinite elements, with emphasis on their formation and range of application.
本文第一部分对已有的几种主要的无限单元进行介绍和评述，着重介绍这些无限元的形成和适用范围。
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