A single act of rebellion or disobedience was often enough to seal a woman's fate.

仅一次反抗或不服从的行为在以前就往往足以决定一个女人的命运。

《柯林斯英汉双解大词典》

Like all great events, kindness begins slowly, with every single act.

像所有伟大的事情一样，善良是从每一个行动慢慢开始的。

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But it is not just a single act of will.

不过这并不仅仅是一个单纯的个人意愿上的改变。

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He said the world knows of her because of a single act of bravery that struck a deadly blow to racial hatred.

VOA: special.2009.03.08

If we do not act, fourteen thousand Americans will continue to lose their health insurance every single day."

VOA: special.2009.07.25

This week,a car bomb in Peshawar was the country's single deadliest act of terrorism since 2007.

VOA: standard.2009.10.30

An individual's position in the hierarchy is constantly shifting and any single act may satisfy needs at different levels.

ECONOMIST: Idea

"This could be the single act by Obama that brings Latinos to the polls in record numbers in 2012, " she said.

CNN: Romney, GOP struggle with immigration issues

But the urgency of the threat, and the catastrophic consequences of even a single act of nuclear terrorism, demand an effort that is at once bold and pragmatic.

WHITEHOUSE: Nuclear Security Summit: Presidential Press Conference