1. wide ranging marine turtle with flexible leathery carapace; largest living turtle. 
   广泛分布的海龟，甲壳象柔韧的皮革；最大的活龟。
2. 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，长有坚韧带皮质的背壳，有七根纵向的骨脊
3. animal glue and gelatin 
   动物胶
4. fish glue and gelatin 
   鱼胶
5. small freshwater crustaceans with a shield-shaped carapace. 
   小型淡水甲壳动物，长有盾牌状甲壳。

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