1. 名詞
   (問題等的)癥結, 癥結點/
   難題, 難點
   (爭論、爭議等的)要點/
   關鍵
   難解的謎
   the crux of ...(問題等):
   ...的癥結
   ...的癥結點
   ...的難題
   ...的難點
   

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   同義字詞
   bottom line,bull's-eye,centerpiece,core,essence,gist,heart,kernel,keynote,meat,meat and potatoes,net,nub,nubbin,nucleus,pith,pivot,point,root,sum
   

例句

1. Nexus and Crux (fiction).
2. Q3 is the crux of this post.
3. That's really the crux of it.
4. The crux was certainly 'run out'.
5. Dr. Crux is not a medical doctor .
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