很多罕见的遗传性因素使得儿童的大脑中也累积了大量细胞毒素，如果不加以治疗，就会导致神经类疾病甚至死亡。
Dozens of rare genetic conditions affecting children lead to the buildup of cellular toxins, which without treatment can cause neurological problems and sometimes death.
一个世纪以来，人们认识到，许多危险因素是有遗传性的。
For a century, we have known that many of these risk factors are genetic.
这可以帮助我们弄清是否是遗传性变异促使某些人患这些疾病，还是环境因素通过改变DDAH活性来发挥它们的效应。
It could help us to establish if genetic variation predisposes certain people to these diseases, or whether environmental factors exert some of their effects through modulation of DDAH activity.
对于神经症情感倾向问题的工作，我们已经添加了“婴儿的”因素到那些迄今为止还被视为是躯体性的和遗传性的神经症情感。
Our work on the question of the disposition to neurotic affections has added the 'infantile' factor to the somatic and hereditary ones hitherto recognized.
为什么人们越来越近视？研究报告的作者们表示，近视在家族中传递，具有“高度遗传性”，但环境因素也起着非常重要的作用。
Why are people becoming more short-sighted? The Opthalmology authors say myopia runs in families and is "highly heritable" but environmental factors play an important role too.
母性能力有很强的遗传性，但是其他因素也对母性有同样的影响。
Mothering ability has a strong hereditary aspect, but other factors exert influence as well.
语言学能与认知、心理和生理因素相关联，与其它个体差异相比，语言学能具有遗传性与稳定性的特点。
Language aptitude is related to cognitive, psychological and biological factors and has the traits of innateness and stability.
脱发有先天遗传性或受后天外部因素影响而形成，如压力、饮食习惯、神经混乱、X光照射、药物引起等。
The causes of this disease occurring include inherent and environmental factors, such as pressure, food, disorder of nerve, X-ray, drug and so on.
糖尿病合并妊娠可引起胎儿心脏畸形，是先天性心脏病重要的非遗传性风险因素；
Pregestational diabetes mellitus may cause fetal heart defects, and it is considered to be an important non-genetic risk factors for congenital heart defects.
糖尿病合并妊娠可引起胎儿心脏畸形，是先天性心脏病重要的非遗传性风险因素；
Pregestational diabetes mellitus may cause fetal heart defects, and it is considered to be an important non-genetic risk factors for congenital heart defects.
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