exine extine外膜
exine sculpture外壁纹饰
exine evolution纹饰演化
exine e外壁
Pollen exine花粉外壁
exine exine外膜
exine ornamentation外壁纹饰
l exine外壁
exine ultrastructure外壁超微结构
N（名词） the outermost coat of a pollen grain or a spore (花粉粒或孢子)外壁 [botany] → compare intine