其他不确定因素，例如人的生活方式和环境，也是致病原因之一，这也使得提取基因角色的工作更加复杂化。
Other variables, such as a person's lifestyle and environment, are also part of the equation and make extracting the role of genes more complex.
来自国际癌症研究署。这个研究小组是世界卫生组织的顾问，主要研究可能会引起癌变的环境因素和生活方式。
The panel, the International Agency for Research on cancer, ACTS as an adviser to the World Health Organization, focusing on environmental and lifestyle factors that may contribute to cancer.
研究人员对65对双胞胎的皮肤损伤环境影响因素进行分析后发现，环境和生活方式对皮肤老化的影响大于遗传因素。
Their analysis of environmental skin-damaging factors in 65 pairs of twins hints that skin aging is related more to environment and lifestyle than genetic factors.
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