单词：germ layer formation
germ layer formation的用法和样例：
例句
- Many signaling pathways play important roles in the formation of mesoderm and patterning of the neuroectoderm during early development of vertebrate embryos.在脊椎动物胚胎的早期发育中，多种信号途径对中胚层形成和神经外胚层分化起着重要的调节作用。
- The mucosa layer had primary longitudinal folds,which derived of secondary and ter-tiary folds in the oviduct infundibulum and ampulla.黏膜层形成大小不等的初级纵行皱褶。
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