a key problem

• 一个关键问题

a key problem的用法和样例：

例句

1. An essential problem for Asia is its dependency on imports.
   对于亚洲而言，一个关键问题是对进口的依赖。
2. What he has tried to expound in this article bears on a key problem in our economic reform.
   他在这篇文章中力图阐明的与我们经济改革中的一个关键问题有关。