这是发生在皮肤的真皮层，由于胶原蛋白和弹力纤维越来越硬，厚而然后结合在一起。
This occurs in the skin's dermis, as a result of collagen and elastin fibers becoming hard, thick, and then binding together.
成熟的坚果卵形或椭球形，外壳厚，纤维质，内果皮硬。
Mature nuts ovoid or ellipsoid, shell thickness, fiber, endocarp hard.
悬垂的天花板由压缩竹纤维制造，所有硬表面由抛光熔岩水磨石做成。所有木地板由可回收柚木制成。
The suspended ceiling is made from compressed bamboo fiber, and all hard surfaces are made from polished lava terrazzo. All wooden floors are made from reclaimed teak wood.
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