The Minister was proving unbending on key issues.

关键问题上该部长决不通融。

They zeroed in on the key issues for discussion.

们把注意力集到讨论关键问题上。

What he has tried to expound in this article bears on a key problem in our economic reform.

这篇文章力图阐明们经济改革一个关键问题有关。