With the popularization of distributed computing, as the key technology for resolving the problem of distributed isomerism, middleware is developed rapidly.
随着分布式计算的普及，中间件作为解决分布式异构问题的关键技术，得到了飞速发展。
Education resources grid is one kind of data grid, has its characteristics such as distributed, isomerism, autonomy, dynamic and hierarchical and so on.
教育资源网格作为数据网格的一种，具有分布性、异构性、自治性、动态性和层次性等特点。
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