在湿润、半湿润地区，由于风蚀作用把地表土层中的细小颗粒和营养物质带走，造成地表土层物质粗化、贫瘠的现象或过程。
... shifting of sand dunes 风沙化 shifting sand burying crops 移动的沙子埋掉庄稼 shifting dunes and sand 移动的沙丘与沙子 ...
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风沙化土地既是可利用的土地资源，又是环境污染的物质源地。
The wind-drift sand land is both an available land resource and a source of pollutants of environmental pollution.
芦笋既具有适应风沙化土地生态系统特点的生物学特征，又具有很好的经济价值。
Asparagus not only has high economic and nutritional value, but also has it biological characteristic of adapting to the ecosystem of wind-sandy wasteland.
并且我国的风沙化、沙漠化、水土流失、空气和水资源的污染等，环境问题也日益严重。
Furthermore, our environment problem becomes more and more serious, such as desertification, air and water pollution and so on.
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