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短语
placenta [plə'sentə] 形容词
卫生保健 placenta
 英语 词库
placenta [plə'sentə] 形容词
医疗的 The sac-shaped organ that develops in the uterus of a pregnant woman. The placenta provides the fetus with oxygen and nutrients and takes away wastes, such as carbon dioxide, via the umbilical cord.
placenta: 67 短语, 6 学科
一般1
医疗的59
卫生保健1
植物学1
老兵专用医药4
联合国1