“seed fern”的概念、定义、翻译、参考文献-科学参考

单词	seed fern
释义	seed fern [`sēd ´fǝrn] ^PALEOBOTANY The common name for the extinct plants classified as Pteridospermae, characterized by naked seeds borne on large, fernlike fronds.
随便看	apex impulse apex stone Apgar score aphagia aphakia aphaniphyric aphanite aphanitic Aphanomyces A phase aphasia aphasic seizure Aphasmidea Aphelenchoidea Aphelenchoidoidea aphelion Aphelocheiridae aphesperian aphid Aphididae Aphidoidea Aphis aphonia aphotic zone Aphredoderidae

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