on the horns of a dilemma
左右为难，进退两难
书面/口语·描述进退两难
英文释义
to be faced with a difficult choice between two equally unfavorable options
例句
She's on the horns of a dilemma: take the job or stay with her family.
典故来源
源自逻辑学，指两个不利选择如同公牛的双角，无论选择哪边都会受伤。