罢工的核心问题是工作职位的保留。

The central issue in the strike was the preservation of jobs.

《牛津词典》

问题的核心是供给和需求。

The heart of the problem is supply and demand.

《柯林斯英汉双解大词典》

第三世界国家的巨额债务负担成了许多较贫困国家领导人的核心问题。

The massive debt burden of the Third World has become a crucial issue for many leaders of poorer countries.

《柯林斯英汉双解大词典》

That is to say, maybe the most central and, for me, possibly the most fascinating question theory asks is well, what is literature?

对我而言，理论提出的最核心，也许是最有趣的一个问题是,文学是什么？

耶鲁公开课 - 文学理论导论课程节选

Now that's precisely the question that Freud asked himself in Beyond the Pleasure Principle, a text which begins with a consideration of trauma victims.

这就是弗洛伊德,在他的《超越快乐原则》中提到的核心问题，整篇文章以对创伤患者的考虑开始。

耶鲁公开课 - 文学理论导论课程节选

So I haven't done magic, I've given you a really fast way to solve a knapsack problem, but it's still exponential deep down in its heart, in something.

所以我并没有施魔法，我已经告诉了你,一种快速解决背包问题的方法了,但是某些方面它的核心仍然是指数增长的。

麻省理工公开课 - 计算机科学及编程导论课程节选