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词汇 monotreme
释义

monotreme

noun
/ˈmɒnətriːm/
/ˈmɑːnətriːm/
(specialist)
  1. a class of animal including the echidna and the platypus, that lays eggs, but also gives milk to its babies单孔目动物(卵生哺乳动物)Topics Animalsc2
    词源mid 19th cent.: from mono- ‘single’ + Greek trēma ‘hole’.
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