... extraeconomiccompulsion经济外强制 经济外强制 extraembryonic胚外的 extraembryoniccapillarynetwork胚外毛细血管网 ...
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胚外中胚层在妊娠的第6.5至7.0天之间通过原始条带迁移到推测的卵黄囊。
Extraembryonic mesoderm migrates through primitive streak to the presumptive yolk sac between days 6.5 and 7.0 of gestation.
牙齿是典型的上皮-间充质器官，由原口腔上皮和其下方的神经嵴来源的外胚间充质相互作用而形成。
Tooth is a typical epithelium-mesenchyme organ, which is formed through the mutual function between the original oral epithelium and epiblastic mesenchyme from the neural crest below.
早期阶段的幼胚培养成苗与外源激素有一定关系。
Plants normally grown at early stage in young embryos are related to exogenous hormones.
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