时差N小时 为什么烫到的瞬间会觉得冷？(上)

Have you ever dipped your toe into a very hot bath and felt a flash of icy cold just before you realize that its really burning?

你是否试过把脚伸进滚烫的浴盆里却感到一瞬间的凉意，回过神来才意识到水是滚烫的？

After you pull your toe out, you might wonder what causes very hot water to feel cold.

也许把脚伸出来后你很想知道，为什么人会感觉这滚烫的热水冰冷。

This odd¹ sensation² is called paradoxical cold.

这种奇怪的感觉被称为“诡冷觉”，

It's when something very hot feels cold and then painful it's caused by the temperature receptors in the skin.

当一些滚烫的东西会让你感觉冷，然后感到疼痛，这其实是皮肤内的温度感受器在作祟。

There are separate, specific receptors that respond to decreases or increases in skin temperature.

皮肤内分布着独立的特定的感受器，能对皮肤温度的升高和降低作出反应。

If skin temperature drops, the cold receptors fire and if it increases, the warmth receptors fire.

如果皮肤温度下降，冷感受器会发出警告，如果皮肤温度上升，暖感受器会发出警告。

1 odd   

adj.奇特的；临时的；奇数的；n.[pl.]机会

参考例句：

• She looks a bit odd.I wonder what has happened to her.她的神色有些异样，不知出了什么事。
• He's an odd character and no mistake!他的确是个怪人！

2 sensation   

n.感觉，感知力，激动，轰动

参考例句：

• He lost all sensation in his legs through cramp.他的腿部因抽筋而失去知觉。
• Seeing him again after so many years was a strange sensation.那么多年以后又见到他，是一种不可思议的感觉。