Crab sheds its hard shell, its exoskeleton, it has to wait about a week for the new.

当一只青蟹褪掉了它的硬壳(也就是它的外骨骼)之后，新长出的壳要等上大概一个星期才能变硬。

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The hermit crab, barnacle, clam and snail have hard shells to protect themselves.

寄居蟹，藤壶，蚬和螺有很硬的壳来保护自己。

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The hermit crab, barnacle, clam and snail have hard shells to protect themselves.

寄居蟹，藤壶，蚬和螺有很硬的壳来保护自己。

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