问题的关键或核心：指一个讨论、争论或问题的基本、中心或重要的要点或特征。
the most important point
同义词： crux
... basics 基本因素 crux of the matter 问题的关键 nuts and bolts 具体细节 ...
This is the crux of the matter.
这就是问题的关键所在。
Now we come to the crux of the matter.
现在我们来谈问题的症结。
He said the crux of the matter was economic policy.
他说该问题的症结在于经济政策。
The interconnectedness, however, is unchanged, and this is the very crux of the matter.
FORBES: Financial Reform? Sure. But The Systemic Six are Here to Stay
The crux of the matter is there is no concrete evidence supporting the safety claim.
But now to the real crux of the matter- whether creationism is bad science and bad theology.
FORBES: Kentucky Cuts Education; Preserves Tax Breaks For Creationist Theme Park