本文最后对已实现的系统提出了几个优化策略，作为下一步工作的重点。

Some optimization strategies are given at last as the focus of the next step.

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最后，本文对已完成的工作进行了总结，并提出了下一步的研究重点。

Finally, accomplished work is summarized, and the next research points are brought forward.

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最后，本文对已完成的工作进行了总结，并提出了下一步的研究重点。

Finally, accomplished work is summarized, and the next research points are brought forward.

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