其二为黄河两岸阶地和湖盆滩地的新月形沙丘丘顶沙粒粗于其它部位但分选仍然最好。
The second, the crest sand is coarser but still better sorted than any other position of dunes in the banks of the Yellow River.
其二为黄河两岸阶地和湖盆滩地的新月形沙丘丘顶沙粒粗于其它部位但分选仍然最好。
The second, the crest sand is coarser but still better sorted than any other position of dunes in the banks of the Yellow River.
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