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  1. ... in degradation of the land. By pounding the soil with their hooves , livestock compact the substrate, increase the proportion of fine material, and reduce the percolation...

    分類:科學及數學 > 地理學 2007年05月13日

  2. ... the poison to Alexander in Babylon in a mule's hoof , and that Alexander's royal cupbearer, Iollas, brother of ...

    分類:科學及數學 > 地理學 2007年05月17日