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Quicksand consists of a buoyant blend of round granules of light sand, blended with water, or of light soil and gritty mud, or of mud peppered with pebbles. 流沙是由轻沙的圆形小颗粒与水，或轻质土壤及砂砾或掺杂有鹅卵石的烂泥混合而成。