我在想她到底是谁。

I wonder who she is.

《牛津词典》

如果我不一样了，那下一个问题是：我到底是谁？

If I'm not the same, the next question is: who in the world am I?

youdao

它到提醒了我——到底是谁这些天里在用玉米花生糖应付奖品？

That reminds me - what the hell is the deal with the prizes in Cracker Jacks these days?

youdao

So he asks who God is, God says, "I am who am I am" or "I will cause to be what I will cause to be."

他问上帝到底是谁，上帝回答“我是自有永有的“,或者“我将会是我本该是的模样“

耶鲁公开课 - 旧约导论课程节选

After logging into the course's website, you'll appear on the top left-hand corner as I just did with your actual names that we know exactly who we're working with and then what you can do is raise your hand sort to speak.

登录课程网站之后，你将被显示在,左上角，通过你们的真实名字,我可以知道我到底是在跟谁一起工作,然后你们可以做的是举手来回答问题。

哈佛公开课 - 计算机科学课程节选

If we torture this one,this thing,whoever it is, Linda is going to think to itself,I'm Linda.

如果我们折磨这个人，这个东西，不管它到底是谁，它将会心想，我是。

耶鲁公开课 - 死亡课程节选