Thevolcanoisoneofthe的精選

問題詳情：Thevolcanoisoneofthemostsurprisingfrighteningforcesofnature.Maybeyouhaveseenpicturesofthese“fireworks”ofnature.Sometimeswhenavolcanoerupts,averylargewallofmeltedrockmovesdownthesideofamounta...