慢速英语:新研究将助孕妇足月分娩

gestation – n. the time when a person or animal is developing inside its mother before it is born

womb – n. a woman’s uterus where a baby is formed

DNA – n. deoxyribonucleic acid -- a substance that carries genetic information in the cells of plants and animals

defect – n. a problem or fault that makes someone or something not perfect

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