dilemma

詳細解釋：

di.lem.ma

n.（名詞）
A situation that requires a choice between options that are or seem equally unfavorable or mutually exclusive.
進退兩難：需要在相等或相互排斥的選擇物之間進行選擇的處境
Usage Problem A problem that seems to defy a satisfactory solution.
【用法疑難】 難題：表面看來似乎不能取得滿意解決的問題
Logic An argument that presents an antagonist with a choice of two or more alternatives, each of which contradicts the original contention and is conclusive.
【邏輯學】 二難推理，兩刀論法：在兩個或兩個以上可供選擇的對象中提供一種選擇，但不管選擇那一個對象，它同樣又是反對這一選擇的決定性論證

來源：
Late Latin
後期拉丁語
from Greek dilômma [ambiguous proposition]
源自 希臘語 dilômma [模稜兩可的命題]
di- [two] * see di-
di- [兩個] *參見 di-
lômma [proposition] * see lemma
lômma [命題] *參見 lemma

【引伸】
dil.emmat.ic
In its primary sensedilemma denotes a situation in which a choice must be made between alternative courses of action or argument. Although citational evidence attests to widespread use of the term meaning simply .problem. or .predicament. and involving no issue of choice,74 percent of the Usage Panel rejected the sentence
dilemma 的主要意思是表示處於進退維谷的境地。 儘管引用的論據證明含意僅為.問題.或.困境.的詞語達到了普遍運用並涉及沒有選擇的問題，但有74％的用法專題使用小組成員否定了句子
例句：
Juvenile drug abuse is the great dilemma of the 980`s. ·
青少年吸毒的陋習是80年代的大問題。

It is sometimes claimed that because thedi- in dilemma comes from a Greek prefix meaning .two,. the word should be used only when exactly two choices are involved.But '4 percent of the Usage Panel accepts its use for choices among three or more options in the example
據說有時因為dilemma 中的 di- 出自於一個含意為.兩個.的希臘語前綴， 所以只有當在包含恰恰正是兩種選擇的時候才應使用這個詞。但有'4％的用法小組成員承認在三個或更多選擇的例句中的使用，如
例句：
Ph.D. students who haven`t completed their dissertations by the time their fellowships expire face a difficult dilemma:
哲學博士生們在研究生職位期限終止時還沒有完成其論文就要面臨一種進退兩難的境地：

whether to take out loans to support themselves, to try to work part-time at both a job and their research,or to give up on the degree entirely.
不是扣除支持其學業的貸款從事半工半讀，就是徹底放棄學位