4 sentences

1. 这种苹果的表皮非常薄。

   zhè zhǒng píng​guǒ de biǎo​pí fēi​cháng báo.

   The skin of this kind of apple is very thin.

   Source: Dong Chinese Dictionary

2. 他的手臂表皮被轻微划伤了。

   tā de shǒu​bì biǎo​pí bèi qīng​wēi huá​shāng le.

   The skin on his arm was slightly scratched.

   Source: Dong Chinese Dictionary

3. 这种薯的表皮是黄色的，吃起来口感很面。

   zhè zhǒng shǔ de biǎo​pí shì huáng​sè de, chī qi​lai kǒu​gǎn hěn miàn.

   The skin of this tuber is yellow, and it has a starchy texture.

   Source: Dong Chinese Dictionary

4. 这种鳄的表皮非常粗糙，像是一层厚厚的铠甲。

   zhè zhǒng è de biǎo​pí fēi​cháng cū​cāo, xiàng​shì yī céng hòu hòu de kǎi​jiǎ.

   The skin of this crocodile is very rough, like a thick layer of armor.

   Source: Dong Chinese Dictionary