Two cell layers (diploblastic) separated by a gelatinous mesoglea.
细(),凝胶状的胶。
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The jellyfish absorbs oxygen through its ectoderm and can store it in the mesoglea.
水母通层吸收氧气,并将其储存在中胶层中。
When he scratched the top of such a stack with a scalpel and exposed it to water, it did, indeed, come loose and fall off as the water seeped into the underlying glue.
他用一把手术刀将这种堆叠结构的表层刮破,与水接触。水渗入下方的胶层,表层果真松动并脱落。
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