- problem box
- 难题: difficult problem; a hard nu ...
- 箱: chest; box; case; trunk
- 难题: difficult problem; a hard nut to crack; aporia; poser; hot potato; facer; headache; stinker; teaser; ticklish problem 出难题 set difficult questions; 处理难题 handle a hot potato; 如何提高产品质量对他来说可是个难题。 how to improve the quality of products was a difficult problem to him. 这道题看起来很简单, 但当你要解它时你就会发现它确实是一道难题。 the problem looks simple enough, but when you come to try and solve it you'll find it's a real teaser
- 问题箱: problem box
- 八难题: eight puzzle
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