When you're exposed to high enough heat, something called dynorphin is released.

当人体周围温度时，大脑会分泌一种叫强啡的物质。

That's not the result we're going for, but when dynorphin is released, more of the receptors that endorphins bind to are created and it sensitizes them to endorphin.

这显然们想要的，然而当强啡产生之时，人体会生成更多内啡的受体，它们对内啡十分敏感。