名词
中文翻译：沙堆
同义词：
['mound of sand', 'sand pile', 'sand hill']
例句：
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1.The children were playing in the mound of sand by the beach.
孩子们在海滩上的沙堆里玩耍。
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2. The sand pile was covered with seashells and shellfish.
沙堆上覆盖着贝壳和贝类。
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3.The sand hill is a popular spot for hiking and picnicking.
沙丘是徒步和野餐的热门地点。