Once again he had to readjust to living alone.

他又一次不得不重新适应单独居住。

《牛津词典》

Once upon a time, a wealthy old man lived alone in a big house.

从前，一位富有的老人独自住在一所大房子里。

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Once upon a time, people who lived alone tended to be those on either side of marriage—twentysomething professionals or widowed senior citizens.

曾几何时，独自生活的人往往是婚姻中的任意一方——或是包括20多岁的专业人士，或是丧偶的老年人。

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He led her back to her room where she waited once more, alone with her thoughts.

VOA: special.2009.09.26

At the far end of the hall he went into the bedroom he had once shared with his twin brothers, which now, in 1955, was his alone, but he stayed in his room for not more than two minutes. When he came out, he had on the same sweaty shirt.

在走廊的尽头，他走进卧室,他曾和他哥哥一起住在这间卧室，现在，1995年的时候，他自己住了，但是他在里面待了,不到2分钟，走出来的时候，他的衬衫湿透了。

耶鲁公开课 - 1945年后的美国小说课程节选

Cazeau once more ate dinner alone.

VOA: special.2009.06.27

In the end, the Democrats have a good chance of prevailing on election day: it is hard to see dyed-in-the-wool Democrats opting for Mr Bush once alone in the voting booth.

ECONOMIST: Shock-horror in the Soprano state

Where CBS was once alone, it now faces a vast array of rivals who learned from the "tiffany" network's early success and have become adept at beating them at their own game.

FORBES: For CBS, Reality Bites

Federal regulators now touch areas of economic activity they once left alone, such as greenhouse-gas emissions.

ECONOMIST: The size of the state