At present, the control of manpower responsibility cost is a difficult point of enterprise cost management and control in the construction of railway engineering projects.
目前铁路工程建设施工中人工责任成本的控制是企业成本管理与控制的难点。
The resources in the grid environment have the dynamic and isomerous characteristics. The Management of resources is the key point and difficult point.
网格环境中的资源具有动态性和异构性的特点，网格环境中的资源管理和资源的动态发现是网格技术的重点和难点。
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。
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