Conclusion: root surface is the risk factor of root caries.

结论：根面是根龋的易感因素。

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Water deficit is influenced by the level of soil water potential at the root surface.

水分亏缺是受根系表面土壤水势高低影响的。

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Water deficit is influenced by the level of soil water potential at the root surface.

水分亏缺是受根系表面土壤水势高低影响的。

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