遗传学的一场革命将这一问题定位为一个有关我们社会特征的现代政治问题：如果性格与我们的基因紧密相连，那么政府能做些什么来帮助我们呢？
A revolution in genetics has poised this as a modern political question about the character of our society: if personalities are hard-wired into our genes, what can governments do to help us?
许多科学家曾经认为，同卵双胞胎在外貌上的相似是由基因决定的，而他们之间的性格、智力和其他差异则是受到环境的影响。
Many scientists once believed that physical similarities between identical twins are genetic, while their personalities, intelligence and other differences between them are an effect of their environment.
大多数我们所关心的性格并不仅仅受一个几个却是上百个基因的影响。
Most traits we care about will be influenced by not one or a few but hundreds of genes.
在寻找长寿之旅中我发现这种坚定的开朗性格比好的基因更为重要。
In the search for longevity it seemed to me that this steadfastly bright disposition was even more important than good genes.
这在现实中是很难区分的，因为现实中很难，把基因和环境分开来讲，你和我有不同的性格，为什么？
This proves to be really difficult in the real world because in the real world it's hard to pull apart genes and environments so, you and me will have different personalities? Why?
国民性格毕竟不是由基因决定的。
另一个可能性是，这项基因使你性格较外向，更喜欢花时间与他人相处，从而有助于你提升面孔辨识能力。
Another possibility is that the genes may make you more extroverted, and spending more time with people helps you get better at recognizing faces.
人们越来越清楚的认识到，性格和才智，至少部分是具有遗传性的。所以假设乐观与悲观的倾向在某种程度上通过基因传递着。
That personality, along with intelligence, is at least partly heritable is becoming increasingly clear; so, presumably, the tendency to be happy or miserable is, to some extent, passed on through DNA.
内部因素最主要的是遗传基因，比如许多兄弟姐妹性格比较相似。
The main internal factors are genetic, such as brothers and sisters in many more similar personality.
由于同卵双生的双胞胎基因完全相同，而异卵双胞胎不完全相同，所以研究人员可以分辨出决定某些性格特征及使人容易快乐的共同基因。
Because identical twins share the same genes and fraternal twins do not, the researchers could identify common genes that result in certain personality traits and predispose people to happiness.
性格取决于我们内在基因以及成长经历。
虽然关于双胞胎的研究对确定一个性格特征在多大程度上能够被遗传很有帮助，但是这项研究并未指出到底是哪个基因起到了遗传作用。
But while twin studies are useful for establishing the extent to which a characteristic is heritable, they do not finger the particular genes at work.
虽然关于双胞胎的研究对确定一个性格特征在多大程度上能够被遗传很有帮助，但是这项研究并未指出到底是哪个基因起到了遗传作用。
But while twin studies are useful for establishing the extent to which a characteristic is heritable, they do not finger the particular genes at work.
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