家庭环境带给孩子的影响是很难在后天改变的。
The influence of family environment to children is hard to be changed as an acquired disposition.
最近的研究显示，细菌的细胞同样受后天改变的影响，这些遗传变化有时是对外部环境刺激的反应。
Recently, it has been shown that germ-cells, too, are subject to epigenetic change, sometimes in response to environmental stimuli.
甲基化作用是对DNA的后天修改，并改变基因活动，通常是在基因组内减少这个活动。
Methylation is an epigenetic modification to one's DNA that changes a gene's activity, generally reducing that activity within the genome.
这一结果提示，不同光照条件在孵化过程中，对NCAM表达的影响，参与了光照对小鸡后天学习记忆行为改变的过程。
All this suggested that the NCAM, which regulated by light exposure, might be involved in post hatch learning and memory behaviour.
这一结果提示，不同光照条件在孵化过程中，对NCAM表达的影响，参与了光照对小鸡后天学习记忆行为改变的过程。
All this suggested that the NCAM, which regulated by light exposure, might be involved in post hatch learning and memory behaviour.
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