Because Grid resources lie in different geographical positions, managed by different organizations, and some resource may fail sometimes, task scheduling and load balancing are very complex.

由于网格资源通常是位于不同的地理位置，由不同的组织管理，加之系统可能发生故障，所以在大型网格环境中任务调度和负载均衡是一个非常复杂的问题。

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