situation in which one has to choose between two undesirable things or courses of action 进退两难的窘境; 进退维谷的困境: be in/place sb in a dilemma 陷入[置某人於]进退两难之境. 
(idm 习语) on the horns of a dilemma => horn.
/ dI5lemE, daI-; dE`lZmE, daI-/ n situation in which one has to choose between two undesirable things or courses of action 进退两难的窘境; 进退维谷的困境: be in/place sb in a dilemma 陷入[置某人於]进退两难之境. (idm 习语) on the horns of a dilemma => horn.