| 单词 | blastula |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔blastocyte〕An undifferentiated blastomere of the morula or the blastula stage of an embryo.胚细胞：桑椹胚或囊胚期胚胎的未分化分裂球美国传统〔emboly〕The formation of a gastrula from a blastula by invagination.内陷：囊胚翻转形成胚囊美国传统〔epiblast〕The outer layer of a blastula that gives rise to the ectoderm after gastrulation.外胚层：囊胚的外层，在原肠胚形成之后生后外胚层组织美国传统〔invaginate〕To infold or become infolded so as to form a hollow space within a previously solid structure, as in the formation of a gastrula from a blastula.套叠：折叠或变成折叠以便在原先实心的结构中形成一个中空的空间，如囊胚形成原肠胚的过程美国传统〔invagination〕Embryology The infolding of a portion of the outer layer of a blastula in the formation of a gastrula.【胚胎学】 肠套叠：在原肠胚形成过程中囊胚的外层的折叠部分美国传统〔involution〕Embryology The ingrowth and curling inward of a group of cells, as in the formation of a gastrula from a blastula.【胚胎学】 内长：一组细胞的内部或向内生长，如从囊胚到原肠胚的生长过程美国传统〔morula〕The spherical embryonic mass of blastomeres formed before the blastula and resulting from cleavage of the fertilized ovum.桑椹胚：形成于囊胚之前且处于胚胎期内的球形裂球群，由受精卵细胞的分裂而成美国传统 |
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