• Slippery Elm (Ulmus rubra) bark was used both internally and externally by native Americans and early pioneer settlers.

    (榆树杨梅)用树皮内部外部土生土长美国人和早期定居者的先驱

    youdao

  • Slippery Elm (Ulmus rubra) bark was used both internally and externally by native Americans and early pioneer settlers.

    (榆树杨梅)用树皮内部外部土生土长美国人和早期定居者的先驱

    youdao

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