a new problem threatens to earn them

“just as...,a new problem threatens to earn them.”
“当...一个新的问题开始威胁他们。”这是原文的翻译。
我迷糊的是：如果threaten理解为威胁，那么这里的earn怎么理解呢？

There is a new problem involved in the........ We didn't know ______such a difficult problem. it is a problem that doesn't need___right now a problem class A<T>where T:new()是什么意思 There is a new problem involved in the popularity of private cars ___ road conditions need___ There is a new problem;involved in the popularity of private cars that road conditions need Please give an example of a time when you developed a new or different solution to a problem. The problem is he can't find a job.是不是错的? 高手帮忙;You don't have to worry about a language problem here