(stuck) in a rut idiom
C2 （工作、方法等）刻板乏味，墨守成规，一成不变
too fixed in one particular type of job, activity, method, etc., and needing to change
I need to change jobs - after 15 years here I feel I'm (stuck) in a rut. 我得换个工作了——在这儿呆了15年，我感觉刻板乏味极了。