想象一个体重正常但不吃很有营养的食物的人，他感觉良好，只是偶尔锻炼，每天去上班。

Imagine a person who is about the right weight, but does not eat very nutritious foods, who feels OK but exercises only occasionally, who goes to work every day.

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美国现在体重超重的人要比体重正常的人要多。

Now there are more overweight people in America than average-weight people.

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即便你的体重正常，高胆固醇、高血压、吸烟、久坐和压力都会导致动脉年龄增加。

Even if your weight is under control, high cholesterol, high blood pressure, smoking, sedentary living and stress all are culprits that can accelerate vascular age.

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This normal weight animal like this has its whole equilibrium thrown off, its homeostasis thrown off when its dietary conditions change.

在饮食条件发生变化时,这些正常体重动物的生理平衡被打破,于是摈弃了原来的平衡饮食

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

This is a normal weight laboratory rat given much more than it would-- could necessarily eat of standard laboratory food.

这是一只体重正常的实验鼠,如果我们给它标准的实验室饲料,即使食物分量超出了它的食量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Then, a drops out and you weigh your normal self.

此时就没有 a 了,你又感觉体重正常

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