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词汇 placenta
释义 placenta /pla'senta; pIs'8LNts/ n (zool) organ lining the womb during pregnancy, by which the foetus is nourished. It is expelled with the foetus and the umbilical cord following birth. (动物) 胎就; 胎衣。→ the illus at reproduce. 参看 reproduce 之逋图。
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