在中文中，“他们非常着急”可以说成“他们非常焦急”或者“他们非常渴望”。在英文中，“非常着急”可以用以下几种表达方式来表示：

very anxious
very eager
very desperate
very impatient

下面是一些例句：

I'm very anxious to hear the results of the election.
She's very eager to start her new job.
He's very desperate to find a cure for his illness.
We're very impatient to see the new movie.

这些表达方式都可以用来描述一个人对某件事情的强烈渴望或焦急，即他们希望尽快得到结果或解决问题。