four-level analyzing model
four-level analyzing model
四级分析模型
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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And we can find the deep-seated reasons of Ling Shan's success by analyzing with the four-level model of cultural tourism products, which proves that the evaluation system is reasonable.
运用文化旅游产品的四层次评价模型对灵山文化旅游产品进行剖析可以发现其成功的深层次理由，同时也证明了模型的合理性。
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