• The result showed that the heavy metal pollution have existed in purple soil area, and it was most obviously at the mining areas and big city suburbs.

    结果表明紫色存在重金属污染问题,尤矿区大城市近郊最为明显

    youdao

  • The result showed that the heavy metal pollution have existed in purple soil area, and it was most obviously at the mining areas and big city suburbs.

    结果表明紫色存在重金属污染问题,尤矿区大城市近郊最为明显

    youdao

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