I say you only live once and we work hard and what's the point if you can't go on holiday.

我觉得你就只活一次，我们努力工作，如果不能去度假的话生活又有什么意义呢？

youdao

And remember, you only live once, but if you live it right once is enough.

记住，你的生命只有一次，但是生活态度正确一次就足够了。

youdao

I will try to live through this day only and not tackle my whole life problem at once.

我将尽力只度过今天而不立刻去解决终身的问题。

youdao

During the entire hour-plus-long keynote, the word "Vista" was only uttered once, and then only in the context of Windows Live compatibility, and in the same quick breath as Windows XP and Windows 7.

FORBES: Magazine Article

Unless you're in a fraternity or live inside a Tommy Hilfiger commercial, you probably play touch football only once a year, and Thanksgiving is that day.

WSJ: Jason Gay: The 32 Rules of Thanksgiving Touch Football