year after year1 CONTINUOUScontinuously for a very long time 日复一日/年复一年等 He’s worked in that same office week after week, year after year, since he was 18. 18岁开始，他就日复一日、年复一年地一直在那同一个办公室工作。
→ day after day/year after year etc at after1(1)
2 year out year after year/year in CONTINUOUSevery year for many years 年年，年复一年 Many birds return to the same spot year after year. 许多鸟类年年都回到同一个地方。
→ year after year/year in, year out at year(4)