与"primitive streak"相近的词条

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• primitive segment
• primitive sex cell
• primitive sex cord
• primitive sheath
• primitive spermatogonium
• primitive streak
• primitive stria
• primitive sulcus
• primitive system of medicine
• primitive thoracic fold
• Primitive tribal spiritual belief
• primitive trophic stage
• primitive trophoblast
• primitive urine
• primitive variety
• primitive vessel

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