| 单词 | 获取营养 |
| 释义 | 〔rich〕"Texas air is so rich you can nourish off it like it was food"(Edna Ferber)“得克萨斯州的空气是如此醇厚，就象食物一样，使你能从中获取营养”(埃德娜·费伯)〔trophoblast〕The outermost layer of cells of the blastocyst that attaches the fertilized ovum to the uterine wall and serves as a nutritive pathway for the embryo. Also called trophoderm 胚胎滋养层：囊胚细胞的最外层，它会将受精卵与子宫壁连在一起，同时它是胚胎获取营养的通道 也作 trophoderm |
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