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.
这种疾病的致病原因未明，但是基因和外部环境不良因素的综合影响被认为是其致病的重要原因。
Its cause is unknown, but a complex mixture of genetic and environmental risk factors is thought to be to blame in many cases.
关于遗传途径，目前多处于假设阶段，许多作者倾向于多基因遗传，即疾病是由于几对致病基因和环境因素共同作用而起病。
On the genetic pathway, present in assuming multi-stage, tend to have many of the genes, that disease is due to several disease genes and environmental factors on the interaction of the onset.
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