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单词 Pteropoda
释义 Pteropoda
[tǝ`räp·ǝ·dǝ]
INVERTEBRATE ZOOLOGY
The sea butterflies, an order of pelagic gastropod mollusks in the subclass Opisthobranchia in which the foot is modified into a pair of large fins and the shell, when present, is thin and glasslike.
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