Turns out that grittier kids were significantly more likely to graduate, even when I matched them on every characteristic I could measure, things like family income, standardized achievement test scores, even how safe kids felt when they were at school.

结果证明那些更具毅力的学生在毕业的概率上占绝对优势，即使是在同样可以量化的外在因素下，像家庭收入，标准化成绩测验的分数，甚至是孩子们在学校能获得多少安全感之类。