详细释义
Noun:
-
central part of a plant ovule; contains the embryo sac
双语例句
- The nucellus is usually degraded and absorbed as the endosperm develops.
珠心通常在胚乳发育时被分解和吸收。 - The region of an ovule that is opposite the micropyle,where the integuments and nucellus are joined.
合点珠孔对面的胚珠内结合珠被和珠心的一个区域。
用作名词 (n.)
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