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来源:雅诚德英语网
The role of the placenta in maintaining sedation is revealed when the umbilical cord is closed off while keeping the fetus adequately supplied with oxygen.
胎盘维持镇静的作用在当脐带封闭保持胎儿足够的摄取氧气时被揭示。
The role of the placenta in maintaining sedation is revealed when the umbilical cord is closed off while keeping the fetus adequately supplied with oxygen.
胎盘维持镇静的作用在当脐带封闭保持胎儿足够的摄取氧气时被揭示。