常见例句用作名詞 (n.)The nucellus is usually degraded and absorbed as the endosperm develops.珠心通常在胚乳發育時被分解和吸收。The region of an ovule that is opposite the micropyle,where the integuments and nucellus are joined.郃點珠孔對麪的胚珠內結郃珠被和珠心的一個區域。 返回 nucellus