两层细胞 ( 两胚层 ),中间是凝胶状的中胶层.Two cell layers ( diploblastic ) separated by a gelatinous mesoglea....

“中胶层”的拼音为：zhōng jiāo céng...

“中胶层”的英语可以翻译为：[无脊椎] mesoglea，mesogloea，middle lamella ...