epicarp

例句：

1. 1. The apple peel is tootough to eat.
   苹果皮太硬不能吃。
2. 2.The apple's flesh is sweet andjuicy.
   苹果的果肉又甜又多汁。
3. 3. The scientist removed theouter layer of the fruit for analysis.
   科学家为了分析，把水果的外层去掉了。