They felt frustrated at the lack of progress.

没有进展，他们感到懊丧。

《牛津词典》

I was a bit depressed by our apparent lack of progress.

我对我们表面上的缺乏进展感到有点沮丧。

《柯林斯英汉双解大词典》

I personally find this lack of progress outrageous.

我个人认为，这一缺乏进展的局面令人难以容忍。

youdao

President Obama has received sharp criticism from Republicans over the lack of progress in job creation.

VOA: special.2010.02.19

My parents were angry at the lack of progress in my medical studies.

VOA: special.2009.07.18

"I think it's fair to say that the American people are frustrated with the lack of progress on some key issues."

VOA: standard.2010.02.09

Beneath the diplomatic language, the group was clearly frustrated by the Iraqi government's lack of progress.

NPR: U.N. Chief in Iraq Sees Limited Progress

Lack of progress is not an option - least of all over the economy.

BBC: NEWS | Europe | EU's 'Waterloo' summit angers press

Some sobering stats and statements about our lack of progress towards the Millenium Development Goals.

FORBES: Fresh Thinking from France and Germany