The incident happened at a critical point in the campaign.

该事件发生在运动的关键时刻。

《柯林斯英汉双解大词典》

He was a key figure in the campaign.

他是这场运动的关键人物。

《牛津词典》

He played a prominent part in the campaign.

他在这次运动中发挥了重要作用。

《牛津词典》

So,President Jackson really heard his last hurrahs in the campaign of another candidate, the man would replace him in the White House.

VOA: special.2010.04.11

From the standpoint of politics for instance, if you want loyal people in a political campaign, do not pay them.

比如，从政治学的观点来看，如果你想在竞选中让手下对自己忠心，那就别给他们报酬。

耶鲁公开课 - 心理学导论课程节选

This was very big in an ad campaign at least last year, I'm not sure if it still is, with the little butterfly.

它的广告宣传做得很大，至少在去年是这样的，我不确定它现在还是不是，它这里有一个小蝴蝶。

麻省理工公开课 - 化学原理课程节选

Then again, the topic has been a sticking point in the campaign of late.

NPR: Obama, McCain Speak At Community Service Forum

Many showed, for the first time in the campaign, Mr Romney in the lead.

BBC: Obama's do-or-die debate

Widely lauded in conservative circles, Ryan's budget plan will become front and center in the campaign.

CNN: Ryan pick will steer Romney campaign to treacherous waters