conundrum
n. 令人迷惑的难题；（尤指答案中含双关语的）谜语
复数 conundrums
例句
But therein lies another conundrum.
但这之中隐藏着另一个难题。
The Hamas conundrum is a huge obstacle.
哈马斯带来的难题就是一个巨大的障碍。
The answer to the conundrum is valuation.
这一难题的答案在于估值。
