The theory research on the domestic circular economy of tourism proceeds rapidly, with the depth and the width reaching a certain level.
国内旅游循环经济的理论研究进展较为迅速，深度和广度都达到了一定的水平。
The theory research on the domestic circular economy of tourism proceeds rapidly, with the depth and the width reaching a certain level.
国内旅游循环经济的理论研究进展较为迅速，深度和广度都达到了一定的水平。
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