If you took blood from the veins of a day labourer while he was working, you would find it full of " fatigue toxins" and fatigue products.

如果你在一个日工工作时抽取他的静脉血液， 你会发现它充满了“疲劳毒素” 和疲劳产物。

But if you took a drop of blood from the brain of an Albert Einstein, it would show no fatigue toxins whatever at the end of the day.

但是，如果你从阿尔伯特·爱因斯坦的大脑中取出一滴血，一天结束时它不会显示出任何疲劳毒素。