| 释义 |
ex·tra·em·bry·on·ic 英ˌekstrəˌembriːˈɒnɪk美ˌɛkstrəˌɛmbriˈɑnɪkAHDĕk'strə-ĕm'brē-ŏnʹĭk COCA²⁸⁰¹³⁶⁺⁵BNC¹⁷³⁹⁹⁵⁺²iWeb⁵⁸²⁷⁴
基本例句
adj.胚胎外的¹⁰⁰
The hematopoietic and vascular systems of the mouse arise from extraembryonic mesoderm that migrate through primitive streak to the presumptive yolk sac between days6.5 and7.0 of gestation.
小鼠的造血和血管系统起源于胚外中胚层。胚胎期6.5-7天时在卵黄囊形成特征性的血岛结构发生向造血和内皮细胞的分化。 cnki |