“Pteridospermae”的概念、定义、翻译、参考文献-科学参考

单词	Pteridospermae
释义	Pteridospermae [´ter·ǝ·dō`spǝr´mē] ^PALEOBOTANY Seed ferns, a class of the Cycadicae comprising extinct plants characterized by naked seeds borne on large fernlike fronds.
随便看	range rod range safety range scale range selection range sensing range spotting range step range strobe range surveillance range sweep range table range-tracking element range unit range wind range zero range zone ranging ranging oscillator ranging rod Ranidae rank rank correlation rank estimator Rankine body Rankine cycle

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