求翻译：高程和坡度对土壤侵蚀的影响并不是单一的正相关，在高程0-500m，坡度0°-25°范围内土壤侵蚀强度变化随高程、坡度的增加而增加，一旦超过这个范围，侵蚀逐渐减少；是什么意思？

Elevation and slope on soil erosion is not a single positive correlation, at the height of 0-500m, slope of 0 ° -25 ° range of soil erosion intensity changes with elevation, slope increases, once over this range, decreasing erosion ;

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The elevation and the slope to the soil erosion influence are not the sole correlations, in elevation 0-500m, in the slope 0°-25° scope the soil erosion intensity change along with the elevation, the slope increase increases, once surpasses this scope, the corrosion reduces gradually;

Effect of elevation and slope on soil erosion is not a single positive, elevation 0-500m rake, 0 °-25 °-wide changes of soil erosion intensity increases with the increase in elevation, slope, once above this range, dwindling erosion;

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