"同龄"的英文译作"peers"或"contemporaries"。例如：

My peers at school are all studying for the same exams. (我在学校里的同龄人都在复习同一场考试。)

Many of my contemporaries in the industry have already achieved a lot of success. (我行业中许多同龄人已经取得了很多成功。)

希望这对你有帮助。