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ectoderm
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ectoderm
Encyclopedia
理学
外胚层
释
ectoderm
外胚层
早期胚胎最靠外的胚层，在原肠胚形成结束时位于胚胎的外层或者覆盖在胚胎的外表面。
Biology
ectoderm
外胚层
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ontological characteristics of film & TV music
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