来自《耶鲁大学开放课程：心理学导论 第10集 第10集》
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because the sweet things in our natural environment like fruit在于自然界里的甜食 比如水果 -
were good for us.对我们是很有好处的 -
In the modern world we have created things like chocolate,现代社会里我们创造出了像巧克力这种 -
which are not so good for us but we eat anyway.对我们没好处但是我们依然喜欢吃的东西 -
A lot of the debates--There's a lot of controversy很多争论 心理学领域对于 -
in psychology over the scope of evolutionary explanations.用进化论来解释问题是很有争议的 -
And a lot of the debate tends to be over很多争论的焦点在于 -
what's an adaptation and what isn't.什么是适应性什么不是 -
There are some clear cases.有些例子是很明显的 -
We have color vision.我们拥有彩色视觉 -
Why do we have color vision?我们为什么有彩色视觉呢 -
Well, I think everybody would agree we have color vision我想每个人都会认同我们的彩色视觉