胚层
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Two germ layers 两胚层
three primary germ layers 三原胚层
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以上来源于: WordNet
N any of the three layers of cells formed during gastrulation 胚层 [embryol] →see ectoderm, mesoderm, endoderm
When an animal develops, embryos form three cellular or germ layers - ectoderm, endoderm and mesoderm - which then go on to form the body's organs and tissues.
当一个生物产生时，胚胎将形成三个胚层外胚层、内胚层和中胚层，然后再由这些胚层形成机体的组织和器官。
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Refining it involves removing the outer layers, including the husk,bran and germ, leaving the inner white kernel.
VOA: standard.2010.06.25
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