1. The hymenium is the fertile layer of cells lining the inner surface of the fruiting body of a fungus.
（子实层是真菌子实体内表面的富含孢子的细胞层。）

2. In some mushroom species, the hymenium is exposed and can be seen as gills on the underside of the cap.
（在一些蘑菇种类中，子实层是裸露的，并且可以在帽子的下面看到，呈现为鳃状结构。）