纪录片《熟食造就了人类吗》 第42期：烹饪使肠胃变小

That's roughly the equivalent of having a 20-watt light bulb

这就相当于有一盏20瓦的灯泡

on inside your head, all the time.

装在你身体里 还一直点亮着

Most other primates¹ use

多数其他灵长类生物

only 10% of their energy to fuel their brain.

脑部只消耗10%的能量

Our huge, hungry brains make us the exception.

我们更大 更耗能的脑袋使我们有别于它们

Our best guess is that, in humans,

最合理的猜测是

once cooking enabled the gut² to become smaller,

烹饪使人类的肠胃变小

then the energy spared from looking after the gut

多余的能量就不用供给胃部

was made available to the brain...

直接供给脑部了...

a very expensive organ that

这么耗能的器官

certainly needs to be fuelled from somewhere.

当然需要能源补给了

So it seems likely that what cooking did was make those big brains possible.

很可能正是烹饪 让人类大脑得以进化

But the big brain which has served us so well...

但是我们一向表现良好的大脑...

is now causing us great problems in the 21st century.

却为21世纪的我们带来了大麻烦

1 primates   

primate的复数

参考例句：

• Primates are alert, inquisitive animals. 灵长目动物是机灵、好奇的动物。
• Consciousness or cerebration has been said to have emerged in the evolution of higher primates. 据说意识或思考在较高级灵长类的进化中已出现。

2 gut   

n.[pl.]胆量；内脏；adj.本能的；vt.取出内脏

参考例句：

• It is not always necessary to gut the fish prior to freezing.冷冻鱼之前并不总是需要先把内脏掏空。
• My immediate gut feeling was to refuse.我本能的直接反应是拒绝。