Prithee, since when hast thou reformed?

请问，你什么时候改过自新的？

youdao

Since when did he ever listen to me?

他什么时候听过我的话？

《牛津词典》

The King asked sharply, "Since when is he a duke, and Lord Protector?"

国王厉声问道：“他什么时候当上公爵和摄政王的？”

youdao

And since when do vampires like baseball? Well, it's the American pastime, and there's a thunderstorm coming.

VOA: standard.other

And we're actually going to get a little bit deeper in our clicker questions here, since when you do your problem-set it won't be quite this straight forward that you'll be answering this kind of question, but actually you'll be thinking about how many different orbitals can have certain state functions or certain orbital names.

事实上我们要讲的,比这个问题还要深一些，因为当你们做习题集的时候,你们不会遇到这么明显的问题，而是要考虑有多少个轨道,有某种特定的态函数,或者特定的轨道名字。

麻省理工公开课 - 化学原理课程节选

Flanders, since when do you like anything cool?

弗兰德，你什么时候也开始赶时髦了？

耶鲁公开课 - 公正课程节选

Since when were the Little Ice Age and the Black Death the Good Old Days?

FORBES: The Black Death: Longing For The Good Old Days

Since when does the honey-throated howler share the royalties with the cats backing her up?

NPR: Tierney Sutton: 'I'm With the Band'

But since when has media coverage of alleged global warming crises been objective and nonpartisan?

FORBES: Another Global Warming Crisis Canceled For Lack Of Evidence