棘手的问题
... a stubborn illness顽疾 stubborn problem棘手的问题 inquire a matter of sb.向某人打听一件事 ...
多年来电气误操作事故是困扰发电厂及电网安全运行非常严重的一个“顽症”。
With the largest amount of debt relative to the size of its economy among the rich countries, and a stubborn deflation problem to boot, Japan has an economic time-bomb ticking beneath it.相对于经济总量来看,日本的债务规模是发达国家中最大的。另外,它还面临着顽固的通缩难题。
The problem is stubborn.这是一个棘手的问题。