One must die and one must live.

我们之中必须有一个死去，有一个活下来。

youdao

One must live with time and die with it, or else elude it for a greater life.

人们必须与时间存亡，亦或者逃避世界追寻更高远的生活。

youdao

There are many ways of keeping fit. First and foremost, one must live a proper life.

许多方法可以保持形体，但首先，一个人必须有适合自己的生活方式。

youdao

If it cannot live in the hearts of its people, then it must one day die."

VOA: special.2009.07.16

At the end of the day, better that five should live even if one must die.

最终结论：，牺牲一人保全五人，是更好的选择。

耶鲁公开课 - 公正课程节选

And because most of the new immigrants are people of color, cultural adjustments must be made by all groups in America if we are to learn to live together as one nation."

VOA: special.2011.03.20

You must live in one place and operate in another.

NPR: Robert Jordan, Hemingway's Bipartisan Hero

Gordon Brown, who is in Bradford for a memorial ceremony, has said a "better system" for expenses is needed - but one that recognises that MPs must live in two places, Westminster and their constituency.

BBC: Ministers defend expenses claims

Good pitchers are one in a million, which means that hundreds of them must live in China.

ECONOMIST: Baseball in China