同年龄组的人的英文怎么说

同年龄组的人的英文：
cohorts

cohort analysis traces the subsequent vital history of such cohorts
对同批人进行分析能追溯出这种同批人随后的重大历史。

The gangster walked into the room surrounded by his cohort.
一名匪徒走进被他的一帮人包围的屋子。

The cashiered dictator and his cohorts have all written their memoirs
被革职的执政官和他的同谋者已经写了他们的实录，

The cashiered dictator and his cohorts have all written their memoirs.
被革职的执政官和他的同谋者已经写了他们的实录。

HCV-796 drug levels appeared to reach a plateau at the 1000 mg cohort.
药物水平比例似乎在1000 毫克步兵大队到达高地。