Tests were carried out by teachers on the entire cohort of eight to nine year-olds in their third year at primary school.测试是由老师在小学三年级所有八岁到九岁的学生中进行的。She speaks for a whole cohort of young Japanese writers.她是所有日本年轻作家的代言人。Depression was a common problem for people in that age cohort.抑郁症是那个年龄段人群的普遍问题。