英语翻译：
difficult problem; puzzle; conundrum; problem
【法】 knot; problem; staggerer; toughie
相关词条：
1.conundrum 2.vexedquestion 3.knottyproblem 4.Gordianknot 5.puzzler 6.puzzle 7.problem 8.poser 9.nut(cover) 10.puzzles 11.tickler 12.brainteaser 13.Chinesepuzzle 14.Crux(CrU) 15.floorer 16.staggerer
例句：
- 这部影片分散了我的注意力，让我暂时忘记了这些难题。
The film managed to distract me from these problems for a while.
- 交通拥挤是许多旧城镇的难题。
Heavy traffic poses a problem in many old towns.
- 再伟大的学者也没有办法解答这个难题吧。
The greatest scholar cannot solve this difficult problem.
- 他的工作不仅要处理难题而且也要应付突来的挑战。
His job is not only to dispose of problems but (also) to meet unexpected challenges.
- 事情一定以某种方式发生以结束冲突或解决难题。
Something is bound to happen one way or another to end the conflict or solve the problem.
- 我们教授非常有才干，必定能解决这一难题。
Our professor is too capable not to solve this difficult problem.
- 我解答不了这个难题。
I can't solve the problem.
- 我们突然遇到各种各样的难题。
All sorts of problems assailed us suddenly.
分词翻译：
难的英语翻译：
adversity; bad; blame; difficult; disaster; hard; hardly possible
题的英语翻译：
inscribe; problem; subject; title; topic