1. The leaf surface is mostly smooth and no waxy or corneous types; however there are some species with the surface covered with ridges of wax or waxy types.
叶表面通常光滑无蜡质或角质，部分种叶表面具薄片状或层状蜡质。
youdao
2. Still can lose furrow area flexibility and corneous layer to add thick cortex to depart additionally, this also can drive circumjacent skin to undertake updating.
另外还可以将皱纹区失去弹性和角质层加厚的皮层分离出去，这也会带动周边的皮肤进行更新。
youdao
3. Still can lose furrow area flexibility and corneous layer to add thick cortex to depart additionally, this also can drive circumjacent skin to undertake updating.
