Their failure to act is indicative of their lack of interest.

他们未采取行动，这表示他们没有兴趣。

《牛津词典》

The council's failure to act is a scandal.

市议会未能采取行动是一件丑闻。

youdao

Only by this means is it possible to explain his failure to act decisively.

只有这种方法，才有可能解释他没有采取决定性行动的原因。

youdao

General McClellan kept making excuses for his failure to act.

VOA: special.2009.09.17

Republicans also link potential costs with what they say is the failure so far of the American Recovery and Reinvestment Act the $787 billion stimulus plan approved by Congress to speed up economic recovery, an assertion the president and Democrats reject.

VOA: standard.2009.07.21

Yet, failure to act in a timely basis will lead to an even greater crisis.

FORBES: Higher Inflation Is On The Way

Hopefully, such failure to act would be equally disastrous to the political careers of everyone involved.

FORBES: Connect

The states contend that they are suffering significant damage because of the EPA's failure to act.

NPR: Supreme Court Hears Global Warming Arguments