and you need to protect every ounce of stored energy you have,

你需要保护身体里每盎司的储存能量
you don't want to be throwing a lot of heat off

你不想散发出太多的热量
and wasting energy through the metabolic process.

也不想在代谢过程中浪费能量
If all of you went on a diet today,

如果你们今天开始节食
a pretty serious diet something like this,

像是实验中的那种很严格的节食
your metabolic rate would go down very quickly

那么在你还没注意到自己的体重变化前
even before we started to notice big changes in your body weight.

你的代谢率会飞速降低
That happens as a defense against what the body perceives as starvation.

这些都是身体应对饥饿的防御反应
Now when people go on diets the body doesn't recognize that,

现如今当人们节食时身体却无法辨清
well okay I'm trying Atkins because I want to lose five pounds,

我在试图使用阿特金斯饮食法来减重五磅
all it knows is that

众所周知
your body is not getting its usual number of calories,

当你的身体不能获得正常量卡路里时