the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs
造句
用作名詞(n.)
The old, empty exoskeleton is called an exuvia. 脫去的舊的空的外骨骼被稱為蛻。
The exoskeleton of insects is largely made of protein and chitin. 昆蟲的外骨骼大部分是由蛋白質和幾丁質組成的.