trophoblast ['troʊfəˌblæst]

例句:

• Eventually, the trophoblast becomes the placenta.
  来自SA
• Shortly after implantation the blastocyst wall, the trophoblast, consists of two layers of cells.
  植入之后不久,胚囊的壁, 即滋养细胞含有两层细胞.
  
• These cancerous types of trophoblastic disease are called choriocarcinoma and placental site trophoblast tumours.
  来自BBC
• As the trophoblast shell gradually begins to break open, maternal blood placental lacunae.
  由于绒毛细胞外壳逐渐退化开放, 母体血液即涌入绒毛间隙.
  
• If you've ever seen the trophoblast invading the uterus, it invades, spreads, creates a blood supply.
  来自SA