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Runoff, the main precursor for sediment removal in soil erosion, results from seal formation at soil surfaces. ¾¶Á÷ÊÇÒýÆðµÄÄàɳ£¨³Á»ýÎÔ˶¯ÊÇÍÁÈÀÇÖÊ´µÄ¸ùÔ´£¬ÕâÊÇÓÉÓÚÄàɳ£¨³Á»ýÎÔ˶¯Ðγɱí²ãÍÁÈÀ½áƤËùÒýÆðµÄ¡£ Q:what is the mean of"seal formation"? ÕâÀïµÄsealÓ¦¸ÃÊÇÍÁÈÀ½áƤµÄÒâ˼£¬seal formationÊÇÐγÉÍÁÈÀ½áƤ¡£ |

6Â¥2013-01-11 13:30:04
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2Â¥2013-01-09 21:33:25
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3Â¥2013-01-11 11:04:48
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4Â¥2013-01-11 11:09:44













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