This is the crux of the matter.

这就是问题的关键所在。

《新英汉大辞典》

Now we come to the crux of the matter.

现在我们来谈问题的症结。

《牛津词典》

He said the crux of the matter was economic policy.

他说该问题的症结在于经济政策。

《柯林斯英汉双解大词典》

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.

FORBES: Move up http://i.forbesimg.com t Move down

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