其组织形态有南南型、北北型及北南型区域经济一体化。
The types of such organization are south-south type, north-north type and north-south type regional economic integration.
令人惊讶的是，胚胎中局部区域产生了迁移的神经嵴细胞和他们衍生的细胞型，它们与神经或中胚层组织完全无关。
Surprisingly, restricted regions of the embryo generated both migrating neural crest cells and their derivative cell types, without any interaction with neural or mesodermal tissues.
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