英语词汇“primitive streak”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	primitive streak
释义	primitive streak noun : an opaque band that appears in the blastoderm in the axial line of the future embryo but somewhat behind the place where the embryo proper begins to develop and that represents a highly modified blastopore through which the involution of chordamesoderm takes place
随便看	norman norman architecture norman crimson normand normande normande sauce normandy normandy sauce norman-french normanism normanization normanize normannic norman red normative normative normative currency normatively normativeness normative science normative truth normed normergic normergy normo-

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