translation.en: And they happen, on average, to have a certain unique physiology: legs that are very long and very thin at their extremity, and this is because they have their ancestry at very low latitude in a very hot and dry climate, and an evolutionary adaptation to that is limbs that are very long and very thin at the extremity for cooling purposes.
translation.zh: 他们在平均体型上， 都有着非常独特的生理特征： 极端长 和瘦的腿， 这是因为他们的祖先 生活在很低的纬度， 和非常燥热的气候下， 和一种进化性的适应： 以降温为目的的 极端长和瘦 的腿。