名词
中文翻译：胚胎
同义词：
['fetus', 'embryo', 'fetus']
例句：
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1. The baby's smegma embryonum is developing rapidly.
婴儿的胎儿正在迅速发育。
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2. The doctors performed asuccessful surgery on the smegmaembryonum.
医生们成功地为胎儿进行了手术。
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3. The mother was in labor for severalhours before the smegma embryonum was born.
母亲经历了数小时的分娩过程，直到胎儿出生。