She is used to a single life.

她已经习惯了独居生活。

youdao

Some there are, who though they lead a single life, yet their thoughts do end with themselves, and account future times impertinences.

有些人虽然过的是独身生活，他们的思想却仅限于自身，把将来认为无关紧要。

youdao

To live a single life without marriage or children is a personal choice of life style, which deviates from the mainstream cultural norm and living mode.

不婚不育是一种偏离主流文化和主流生活模式的个人生活方式选择，本身具有道德上的可通约性。

youdao

The Buddha talked about it thousands of years ago, "Thousands of candles can be lit from a single candle, and the life of the candle will not be shortened.

佛在几千年前就谈到它，“一支蜡烛可以点燃千支蜡烛，蜡烛的生命不会被缩短。

哈佛公开课 - 幸福课课程节选

I feel like there is a general distinction we made between the right to life that individuals possess and the fact that the government cannot take away a single individual's right to life.

我觉得这两者之间有明显的区别,就是个人所拥有的生命权,以及政府不能夺走,个人生命权的事实。

耶鲁公开课 - 公正课程节选

The ease with which we can lead a single life is, as sociologists show, a social achievement in itself.

NEWYORKER: The Disconnect

But every student and every teacher made it to the roof safely and not a single life was lost in the school.

UNESCO: Published in Mainichi Newspaper on 6 May 2012.

Is there something that the kidnappers would demand that you'd say, well, absolutely not, it's too great a problem and in this out case would outweigh the benefits of saving a single life?

NPR: The Morality of Negotiating with Kidnappers