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The impact of cigarette damage to unborn babies has been revealed in a new stem cell study. 在一项新的干细胞研究中，香烟对未出生婴儿的影响已经得到了揭示。 Scientists found that the cocktail of chemicals in cigarettes is particularly harmful to developing liver cells. 科学家们发现，香烟中化学物质的混合物对正在发育的肝细胞伤害特别大。 They developed a method of studying the effects of maternal smoking on liver tissue using embryonic stem cells. 他们开发了一种方法，用胚胎干细胞来研究母体吸烟对胎儿肝脏组织的影响。 | 
