果皮（guopi）由子房壁的组织分化、发育而成的果实部分。成熟的果皮一般可分为外果皮、中果皮、内果皮3层。但由于果实类型的不同，3层果皮变化很大。
而柳叶菜高扬、毛茸茸的囊果皮让我们想起了夏天。
And the drooping, downy seed-vessels of the epilobium remind us of the summer.
在子房发育为果实过程中，果皮内又形成多数分泌囊，均匀地分布于中果皮内，称为次生分泌囊。
During the development from ovary to fruit, Numbers of secretory cavities arise again in the peel, which distribute evenly in the middle peel and are termed the secondary cavity.
与对照相比，果实遮光处理后降低了果皮与汁囊的干重和含糖量。
The sugar content and dry weights of peel and juice sacs in shaded fruit were lower than that in control fruit.
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