translation.en: And the second group that we've followed was a group of boys from Boston's poorest neighborhoods, boys who were chosen for the study specifically because they were from some of the most troubled and disadvantaged families in the Boston of the 1930s.
translation.zh: 我们追踪的第二组人 是一群来自波士顿贫民区的小男孩， 他们之所以被选中， 主要是因为他们来自 20世纪30年代波士顿 最困难 最贫困的家庭。