translation.en: This graph shows happiness on the vertical axis, and you can see that bar there representing how happy people are when they're focused on the present, when they're not mind-wandering.
translation.zh: 这些柱状图为我们描述了各种状态下的幸福指数， 大家可以看到 眼前这个柱状图代表了 人们集中精神在当下时的幸福指数， 当他们没有走神的时候。