最后提出了对以后进一步研究的方向。

At last, the paper points the further research direction.

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最后总结归纳了本文研究的主要结论，并指明了以后进一步研究的方向。

Finally, it sums up the main conclusion which this article studies, and indicates the direction of later study.

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最后，本文总结了全文的工作，并指出若干有待以后进一步研究的问题。

In the end, all the work had been summarized, and some point needed to be studied more were given.

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