Finally, the author mentioned how to simplify and abstract the core of a pedagogical grammar, which needs further research.

最后，作者就如何提炼和简化目标语的核心语法框架提出了一些建议，并指出这是下一步研究的重点。

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Finally, we make a summary and point out the defects and content which needs further research.

最后，对全文进行总结，指出研究的不足以及需要进一步研究的地方。

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Finally, we make a summary and point out the defects and content which needs further research.

最后，对全文进行总结，指出研究的不足以及需要进一步研究的地方。

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