true decidua

例句：

1. 1. The true decidua of the apple is a protective layer that helps protect the apple from damage during storage.
   苹果的真果皮是一种保护层，有助于在储存期间保护苹果免受损害。
2. 2.The true decidua of the grape is a thin layer that covers the grape and helps protect it from damage during transportation.
   葡萄的真果皮是一种薄薄的一层，覆盖在葡萄上，有助于在运输过程中保护葡萄免受损害。
3. 3. The true decidua of the pear is a thick layer that protects the pear from damage during storage and transport.
   梨的真果皮是一种厚厚的一层，有助于在存储和运输过程中保护梨免受损害。