Enclosure of the nucellus by the integuments is incomplete, the embryo sac or, in gymnosperms, to the archegonium.是什么意思_Enclosure of the nucellus by the integuments is incomplete, the embryo sac or, in gymnosperms, to the archegonium.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句