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单词
embryo sac
释义
WordReference Random House Unabridged Dictionary of American English © 2024
em
′
bryo sac′,
[
Bot.
]
Botany
the megaspore of a seed-bearing plant, situated within the ovule, giving rise to the endosperm and forming the egg cell or nucleus from which the embryo plant develops after fertilization.
1870–75
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更新时间:2025/7/24 20:59:53