| 单词 | trophoblast |
| 释义 | Word Frequency trophoblast(ˈtrɒfəˌblæst) noun the outer layer of cells of the embryo of placental mammals, which is attached to the uterus wall and absorbs nourishment from the uterine fluids Derived forms trophoblastic (ˌtrophoˈblastic) adjective Word origin C19: from tropho- + -blast |
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