Over millions of years your body has evolved for survival.

上百万年来，你的身体为了生存一直在进化着。

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The ability to fall in live evolved because those who focused their courtship attention on a preferred partner saved time and energy and improved their chances of survival and reproduction.

人类恋爱的能力得以进化，是因为求爱者将注意力集中在一个更好的目标上可以节约时间和精力并使他生存和繁衍的机会大大增大。

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The ability to fall in love evolved because those who focused their courtship attention on a preferred partner saved time and energy and improved their chances of survival and reproduction.

恋爱的能力得到进化，是因为求爱者的注意力放在一个更合适的伴侣身上会为他们节约时间和精力，并且增加他们存活以及重生的几率。

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And it's evolved due to survival and reproduction.

它通过生存和繁衍进化。

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They are faced with increasingly difficult physical circumstances: the food web is thinning out, many animals and plants have gone missing, their main food source a type of primitive grass is threatened, and they have to be on the lookout constantly for hostile animals, other less-evolved dinosaurs with more violent survival strategies.

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We as a species have evolved to be internally motivated to share value with our peers as a survival mechanism.

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