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单词
companion cell
释义
WordReference Random House Unabridged Dictionary of American English © 2024
compan
′
ion cell′,
[
Bot.
]
Botany
any of a number of specialized parenchymal cells adjacent to a sieve tube in the phloem of flowering plants, believed to regulate the flow of nutrients through the tube.
1885–90
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更新时间:2025/7/31 2:00:19