名词
中文翻译：胚轴
同义词：
['embryo axis', 'protostele']
例句：
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1.The embryonic stem cells are the building blocks of life.
胚胎干细胞是生命的基础。
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2. The protostele is the first structure to form during the early stages of development.
原基是发育早期形成的第一个结构。
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3. The protostele is responsible for the formation of the vertebrae and other bones in the embryo.
原基负责胚胎中椎骨和其他骨骼的形成。