有一次她让我进入她的内室。

She once allowed me into her inner sanctum.

《牛津词典》

有一次，她用煎锅狠狠地砸了我的头。

Once, she walloped me over the head with a frying pan.

《柯林斯英汉双解大词典》

有一次我们去巴黎时，我忘了带护照。

Once when we were going to Paris, I forgot my passport.

《柯林斯英汉双解大词典》

And I'll say "how are you" and you say something to the effect that if I could afford a latte in this world, I'm doing well.

我问您最近怎么样，您有一次,说了一句话，大致意思是，如果我能,享受得起一杯拿铁，那一切就还好。

普林斯顿公开课 - 人性课程节选

One time, I paid a beggar when I was driving in my car and I was stopped to the stoplight,

有一次，我给过乞丐钱，当时我在开车，正在等红灯，

不做善事的理由 - SpeakingMax英语口语达人

I remember with a Muslim friend of mine, we were comparing Lent to Ramadan.

我记得有一次和一个穆斯林朋友，讨论基督教的大斋期和伊斯兰教的赖买丹月。

普林斯顿公开课 - 人性课程节选