leath.er.backn.(名词)The largest living sea turtle(Dermochelys coriacea), found in tropical waters and having a tough, leathery carapace with seven longitudinal ridges. 棱皮龟:最大的海生龟(棱皮龟) ,生活于热带海域,坚韧的皮质背壳中有七根纵向骨脊