The management of database connection is a difficult point in the development of RES(Remote Education System) based on JDBC in that it is one of the main factors which can resolve the features of RES.
在基于JDBC的远程教育系统的应用开发中，数据库连接的管理是一个难点，因为它是决定该系统应用性能的一个重要因素。
In the process of multi-point forming, dimple and wrinkle are the main defects which limit the development of the multipoint forming technology.
在多点成形过程中，压痕和皱纹缺陷是限制多点成形技术实用化的重要因素。
From the view point of social information environment, to explain the scientific attitude and main purposes of the development of digital library, and its relationship with library service.
着眼社会信息环境，论述数字图书馆建设的科学态度、主要目的以及与图书馆服务的关系。
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