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第一是儿童生来便带有的基因突变，接着需在儿童阶段有个触发事件，比如导致疾病的感染等。

The first is some kind of genetic mutation that a child is born with followed by a trigger in childhood such as an infection that results in the disease, she added.

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每个人带有的这些差异的集合（称作单核苷酸多态性，简称SNPs）造成了他/她的独特性。

Each person's collection of these changes (called "single nucleotide polymorphisms, or SNPs) contributes to his or her individuality.

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In fact, it exists, amazingly, in order to hinder understanding in the kinds of texts that we're inclined to call "poetic."

事实上，它的存在，阻碍我们理解所有带有,诗性的文本“

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So, when we get really close together, granted, there is a net positive negative charge with a Coulombic force of attraction.

当它们真正离得很近时，假设有一个带正负电的电荷,带有库仑引力。

麻省理工公开课 - 固态化学导论课程节选

And in this case, the tie-breaker goes to the molecule in which the negative charge is on the most electronegative atom.

而在这种情况下，我们需要进行“附加赛“,也就是看看分子中带有负的,形式电荷的原子是不是电负性最高的。

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