translation.en: So how could this be happening? I think part of the reason, a big part of the reason, is that when our minds wander, we often think about unpleasant things, and they are enormously less happy when they do that, our worries, our anxieties, our regrets, and yet even when people are thinking about something neutral, they're still considerably less happy than when they're not mind-wandering at all.
translation.zh: 是什么导致了这样的结果呢？我认为部分原因是， 很大程度上吧，是因为当我们走神的时候， 我们经常会想起一些不太愉快的事情，这些事情比 眼下正在做的事情悲惨多了， 我们的担心，忧虑，心中的悔恨， 即便是当人们正在想一些 平淡无奇的事情，人们的幸福指数依然低于 集中精神的时候。