常见例句用作名词 (n.)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。 返回 nucellus