Once time became the problem -- not the vanilla ice cream -- the engineer quickly came up with the answer: vapor lock.

一旦时间变成问题-而不是香草冰激凌-工程师很快找到答案：气阻。

youdao

youdao

Once upon a time there was a beautiful princess.

从前，有一位美丽的公主。

《牛津词典》

People think that once you get infected one time you develop immunity for the rest of your life.

VOA: special.2011.04.20

Once each time. Right? I only do one swap potentially, it-- though not one potentially, each time at the end of the loop I do a swap.

每次循环做一次，对么？我其实,就可能做了一次交换，也许并不是可能，每次循环的结束我都得做一次交换。

麻省理工公开课 - 计算机科学及编程导论课程节选

So it'll be a time once or twice a week where they will be in their office.

所以，他们大概每周有一两次会在办公室里。

与教授的面谈 - SpeakingMax英语口语达人

Led by vocalist and songwriter Shane Nelken, who once spent time as a supporting musician for A.C.

NPR: The Awkward Stage: 'The Sun Goes Down On Girlsville'

Apparently, there was once a time when Jill Clayburgh danced around in her underwear.

FORBES: Connect

There was once a time when I would visit a customer armed with these supplies.

FORBES: How Amy Promotes This Old House