名词
中文翻译：沙丘
同义词：
['sand dune', 'sandy hill', 'sandy ridge']
例句：
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1.The sun was shining on the sandmark of the desert.
太阳在沙漠的沙丘上照耀。
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2. The sandmark is a popular spot for hiking and picnicking.
沙丘是一个受欢迎的徒步和野餐地点。
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3. The sandmark is visible from the top of the mountain.
从山顶可以看到沙丘。