| 单词 | 胚胎期 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔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〔myelencephalon〕The posterior portion of the embryonic hindbrain, from which the medulla oblongata develops.末脑：胚胎期后脑的后部，延髓在此发育美国传统 |
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