| 单词 | Primitive Streaks | 
| 释义 | Primitive Streaks《英文msh词典》Primitive Streaks [入口词] Primitive Streaks [主题词] Gastrula [英文释义] The embryo in the early stage following the blastula,characterized by morphogenetic cell movements,cell differentiation,and the formation of the three germ layers.  | 
	
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