It is thought that a combination of risks, including genetic factors, is involved.

普遍认为一系列的危险因素的组合包口基因因素与之相关。

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Lastly, there are some biological causes of mental disorders including genetic factors and imbalances in chemicals in the brain.

最后一点是，精神疾患具有某些生物学病因，这包括遗传因素以及大脑中的化学品失衡。

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Of course, our brains can decline as we grow older for lots of reasons including other environmental influences or genetic factors.

当然，随着年龄的增长，我们的大脑会出于很多原因而衰退，包括环境影响和遗传因素等。

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Within populations, the interactions between environmental and individual factors, including genetic makeup, explain variability in body size between individuals.

FORBES: The Lancet's Series on Obesity