最后这条毛毛虫把自己黏附在一棵植物上结成个茧儿。
Eventually the caterpillar will attach itself to a plant and sin a cocoon.
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实际上试点是住在一个保护茧的结构和发动机。
In effect the pilot is housed in a protective cocoon by the structure and engine.
皮肤上的茧是如何形成的？
What Are Calluses And How Are They Formed?
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