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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?
你是否試過把腳伸進滾燙的浴盆里卻感到一瞬間的涼意，回過神來才意識到水是滾燙的？
After you pull your toe out, you might wonder what causes very hot water to feel cold.
也許把腳伸出來后你很想知道，為什么人會感覺這滾燙的熱水冰冷。
This odd sensation is called paradoxical cold.
這種奇怪的感覺被稱為“詭冷覺”，
It's when something very hot feels cold and then painful it's caused by the temperature receptors in the skin.
當一些滾燙的東西會讓你感覺冷，然后感到疼痛，這其實是皮膚內的溫度感受器在作祟。
There are separate, specific receptors that respond to decreases or increases in skin temperature.
皮膚內分布著獨立的特定的感受器，能對皮膚溫度的升高和降低作出反應。
If skin temperature drops, the cold receptors fire and if it increases, the warmth receptors fire.
如果皮膚溫度下降，冷感受器會發出警告，如果皮膚溫度上升，暖感受器會發出警告。
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