backward erosion 中文意思是什麼
backward erosion
解釋
反向沖刷-
Evident backward erosion had appeared in the coastline of the delta region in recent years owing to decreaseof flow and sediment from the yellow river
近年來黃河來水來沙呈遞減趨勢，現行河流路海岸線淤進減緩，原行河流路海岸線出現了嚴重的蝕退。 -
In the past decades, some factors of over - loaded caarrying capacity of population, backward modes of production, backward life style and ecological fragility in multi - ethnic areas of the upper reaches of minjing river resulted in ecological degradation, for instance, vegetation, grass degradation and soli erosion and natural calamities occurred frequently
摘要在過去幾十年，由於人口超過環境承載量，人們生產方式和生活方式落後，以及生態脆弱等諸多因素，導致岷江上遊民族地區生態環境退化，如植被，草場，土地的退化及自然災害頻繁發生等。
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