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1.The embryonic layer of the embryo is responsible for forming the nervous system.
胚胎的内胚层负责形成神经系统。
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2. The embryonic layer of the skin is where cells are formed.
皮肤的胚胎层是细胞形成的地方。
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3.The embryonic layer of the brain is crucial for learning and memory.
大脑的胚胎层对于学习和记忆至关重要。