the cruxIMPORTANTthe most important part of a problem, question, argument etc 〔问题、论据等的〕核心,中心;症结the crux of The crux of the matter is how do we prevent a flood occurring again? 问题的关键是我们如何预防洪水再次发生?
The crux of the problem lay in the lack of equipment. 问题的症结在于缺乏设备。
the crux• It's the relationship between Trevor and Meriwether that forms the crux of this movie.
→ the crux at crux(1)