柯林斯英汉双解大词典
ambulacrum /ˌæmbjʊˈleɪkrəm/
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1.
N any of five radial bands on the ventral surface of echinoderms, such as the starfish and sea urchin, on which the tube feet are situated 步带; 步行足
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N any of five radial bands on the ventral surface of echinoderms, such as the starfish and sea urchin, on which the tube feet are situated 步带; 步行足
应用推荐