and then contribute to the gene pool?

这又会导致基因库怎样的改变
Well they're the ones who would do these things--

有人做了一些事情
the behavior things that we mentioned before.

就是我们之前提到的一些行为
They're the ones who would seek out high fat, high sugar diets

这些人追求高脂高糖饮食
because then they would get calories to seek out a variety of food,

以获得足够能量继而寻找更多种食物
to eat in--eat above what immediate hunger might dictate.

饥饿驱使他们吃可以迅速果腹的食品
Those people would bank their calories,

这些人储存能量以保证
survive the next famine,

在下一次饥荒时得以幸存
contribute to the gene pool,

使他们的基因保留在了基因库中
and thereby create what we have today which are organisms, humans,

从而造就今天的生物体即人类
who very much like the kind of diets

人类非常喜欢这类饮食
that are creating problems.

从而引发了很多问题