in response to this very rewarding and pleasurable activity.

作为对这令人愉快的行为的响应
We're here with our friend the rat.

这是我们的大鼠朋友
The poor rat he's just--

这可怜的大鼠只是
we've been using him to be addicted to food

我们使它对某种食物上瘾
and this is really, really where our framework is coming.

以之作为我们研究框架
You can see this guy, he's a little chunky,

你们看这有点矮胖的家伙
and he's gotten some time to really be exposed to a lot of sugar.

它在一段时间内被喂食了大量的糖
Some research coming out of Princeton has found in these animal models

在普林斯顿有对这些动物模型的研究
that by giving rats access to potent amounts of sugar

发现当让大鼠摄入大量的糖
they'll develop tolerance.

它们会形成耐受性
They'll maybe start consuming thirty-five milliliters of sugar a day,

一开始它们可能每天摄入三十五毫升糖
but within a week or two

但一两个礼拜内