目前的调度算法大多是基于任务复制的，没有充分考虑前驱任务与其后继任务间的相关性。
The present scheduling algorithms are mostly based on task duplication, and the dependence between the predecessor tasks and successor tasks is not well taken into account.
大多数作业或任务并不是孤立的，它们彼此有着直接前驱或直接后继的关联。
Most of jobs or tasks are not independent, which are direct forerunners or directly succeeding relations each other.
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