Shortly after implantation the blastocyst wall, the trophoblast, consists of two layers of cells.
植入之后不久,胚囊的壁, 即滋養細胞含有兩層細胞.
辭典例句
As the trophoblast shell gradually begins to break open, maternal blood placental lacunae.
由于絨毛細胞外殼逐漸退化開放, 母體血液即涌入絨毛間隙.
互聯網
"after implantation of the blastocyst in the uterine wall the trophoblast divides into two layers, the chorion and the placenta"
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