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单词 sand dollar
释义
sand dollar
n.
1. Any of various thin circular echinoderms of the order Clypeasteroida, especially Echinarachnius parma, of coastal northern Atlantic and Pacific waters, having a covering of short movable spines.
2. The disklike internal skeleton of a sand dollar, having five radially symmetric oblong markings and often a pattern of long narrow holes.
sand dollar
Clypeaster subdepressus
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更新时间:2025/3/22 11:19:31