She felt it was incumbent on herself to act immediately.

她感到立即采取行动是她义不容辞的责任。

《柯林斯英汉双解大词典》

We must act immediately.

我们必须立刻行动。

youdao

Success belongs to those who act immediately.

成功永远属于马上行动的人。

youdao

The New York demonstrators, who included activists from Latino,Caribbean, and Asian communities in New York as well as local clergy members, called on President Obama to act immediately to stop Arizona's law from being implemented.

VOA: standard.2010.04.28

Wilson wasted no time. He immediately called a special session of Congress to act on Democratic campaign promises to reduce import taxes,or tariffs.

VOA: special.2010.09.23

So, from the moment I took office, we had to act immediately to prevent an even greater catastrophe.

WHITEHOUSE: The Importance of Education Reform

The BOP should act immediately to end these and other unnecessary and wasteful policies.

FORBES: Sequester As Opportunity? Simple Ways To Cut Prison Spending, Maybe Avoid Furloughs

President Bush today urged Republican members of Congress to act immediately on the new economic stimulus package.

NPR: Bush Urges House Republicans to OK Stimulus Plan