几乎任何对人体或大脑造成损害的因素——基因突变，脑部损伤——都容易使人们变得更自私，不那么友善。
Almost anything that messes up your body or your brain-10 mutations, brain damage, brain injury-tends to make people more selfish and less kind.
如果没有感染或手术错误，脑部几乎不会受到损害。
Assuming no infection or surgical error, damage to the brain would be minimal.
美国科学家日前在华盛顿举行的全国细胞生物协会的年会上宣布了一项最新研究成果。 他们发现，长期暴露在充斥着杀菌剂的环境中，可能会使脑部神经系统的发育受到损害。
The finding was described by Dr. Elias Aizenman on Sunday at the annual meeting of the American Society of Cell Biology in Washington, DC.
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