translation.en: Humans have this extraordinarily interesting property that will often seek out low-level doses of pain and take pleasure from it -- as in the eating of hot chili peppers and roller coaster rides.
translation.zh: 人类有这个特别有趣的特质 往往能在掌控的情况下 常常会去寻找低层次的痛苦 然后从中获得乐趣 就像在吃辣椒 和玩过山车一样