解决了我人生的一大疑惑，果然被动画和游戏坑了。。。
What happens if a turtle is out of its shell?
如果把龟壳摘下来会怎样？
原文地址：https://www.quora.com/What-happens-if-a-turtle-is-out-of-its-shell
Turtles are physically incapable of leaving their shell.
乌龟在生理结构上就是不可能脱下身上的龟壳的。
The shell is part of their skeleton, and is very much attached to their body. If you were to forcibly separate the shell from the rest of the body, you would rip the turtle's body apart.
龟壳就是它们自身结构的组成部分，和身体紧紧连接在一起。如果你想把它的壳从身体上摘下来，那么乌龟基本上也就会被掰成两半。
乌龟骨骼
