名词
中文翻译：绒毛膜
同义词：
['placenta', 'chorion', 'placental membrane']
例句：
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1. The fetus is protected by the placenta during pregnancy.
胎儿在怀孕期间由胎盘保护。
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2. The placenta plays a crucial role in the development of the fetus.
胎盘在胎儿发育中起着至关重要的作用。
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3. During labor, the placenta releases nutrients and hormones to support the mother and baby.
分娩期间，胎盘释放营养物质和激素以支持母亲和婴儿。