专家们早就认识到，这个令人沮丧的问题是由多种原因造成的。
Experts have long recognized that this discouraging problem has multiple causes.
事实上，专家们早就发现“期待”会增加幸福感。
In fact, scholars have found that anticipation increases happiness. Considering buying an iPad?
事实上，专家们早就发现，大多数的犯罪案件有直接关系的低收入。
In fact, experts have long found out that most cases of crime are directly related to low income.
应用推荐