Americans are less doubtful when it comes to politics: 73% expect to see a female president in their lifetime.

美国人在政治问题上的意见更统一：73%的人希望在有生之年看到一位女总统。

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20 million American will experience depression sometimes in their lifetime.

有两千万的美国人会在其一生中的某个时期经历抑郁症。

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Every human being dreams of and possesses a desire to visit those places in their lifetime.

每个人都渴望与梦想在他们的人生中可以游览这些地方。

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The World Health Organization says one in three women around the world will experience some form of violence in their lifetime.

VOA: special.2009.10.24

Cells can stop in their lifetime at some point in the cell cycle and persist for long periods of time.

细胞生命期可以停止在细胞周期的某个点,并保持很长时间

耶鲁公开课 - 生物医学工程探索课程节选

There was no good reason in the world that an abolitionist in the 1830s, '40s, and even the '50s, had any right to believe they would see the end of slavery in their lifetime.

然而在这世上并不存在一个好理由,使一个十九世纪三十年代,四十年代甚至五十年代的废奴者,几乎不可能相信,他们在有生之年会看到奴隶制的终结

耶鲁公开课 - 美国内战与重建课程节选

Every Gypsy in the world comes to Appleby at least once in their lifetime.

BBC: Gypsies travel to Appleby 'Mecca' in Cumbria

It is thought one in six men will suffer domestic abuse in their lifetime.

BBC: Call to aid male domestic violence victims in Cornwall

One statistic on this is that around 1960, one in seven doctors had been sued in their lifetime.

FORBES: Head To Head: Small-Biz Health Care