dilemma
/dɪˈlemə/noun
1- a situation in which a difficult choice has to be made between two or more alternatives, especially ones that are equally undesirable（进退两难的）困境, 窘境：
he wants to make money, but he also disapproves of it: Den's dilemma in a nutshell.
他想赚钱, 但又瞧不起钱, 简单地说, 这就是德恩的两难之处。
1.1
- informal a difficult situation or problem〈非正式〉困境; 难题：
the insoluble dilemma of adolescence.
青春期难以解决的问题。
1.2
- Logic an argument forcing an opponent to choose either of two unfavourable alternatives【逻】二难推理, 两刀论法, 假言选言推理。
USAGE
At its core, a dilemma is a situation in which a difficult choice has to be made between two or more alternatives. More informally, it can mean 'a difficult situation or problem' （as in the insoluble dilemma of adolescence）. Some traditionalists object to this weakened use, but it is recorded as early as the first part of the 17th century, and is now widespread and generally acceptable.
词源
early 16th cent. (denoting a form of argument involving a choice between equally unfavourable alternatives)： via Latin from Greek dilēmma, from di- 'twice' + lēmma 'premise'.