N-COUNT
（进退两难的）窘境，困境
A dilemma is a difficult situation in which you have to choose between two or more alternatives.
例句
He was faced with the dilemma of whether or not to return to his country...
要不要回国，他进退两难。
The issue raises a moral dilemma.
这个问题引发了一个道德上的两难抉择。