A fine soil was deposited by winds carrying desert dust.
风把沙漠的沙吹来，堆积成一片幼沙土。
There are three sources of background desert aerosol: global background aerosol, large range background dust and local soil dust.
背景沙漠气溶胶有三种来源：全球背景气溶胶、地区性的背景土壤尘和局地土壤尘。
There are three sources of background desert aerosol: global background aerosol, large range background dust and local soil dust.
背景沙漠气溶胶有三种来源：全球背景气溶胶、地区性的背景土壤尘和局地土壤尘。
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