单词：exoskeletal
exoskeleton的用法和样例：
例句
- The old, empty exoskeleton is called an exuvia.脱去的旧的空的外骨骼被称为蜕。
- The exoskeleton of insects is largely made of protein and chitin.昆虫的外骨骼大部分是由蛋白质和几丁质组成的.
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Amazing Crab s D: What's the difference between a hard- shell ed blue crab and a soft- shell ed blue crab ? Y: Is this a trick question? D: I'll give you a hent. It has to do with the crab s skeletal system. Y: Skeletal system? You got me there, I kn
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