I'll find out and get back to you.

我查明之后再答复你。

《牛津词典》

I'll find out that.

我会查出来的。

youdao

I'll find out her secret.

我要弄清她的秘密。

youdao

I don't know. I'll find out for you for next class though.

我不知道，下节课告诉你答案。

耶鲁公开课 - 心理学导论课程节选

so I'll like to go there and find out for myself.

所以我还是会去那里，看看情况到底怎样。

在哥伦布环岛 - SpeakingMax英语口语达人

If you do that at home I think, but don't trust me, you'll find out that X is equal to a third.

如果你回去自己计算一下,你会发现X等于1/3

耶鲁公开课 - 博弈论课程节选

It's not clear who's telling the truth and I guess we'll find out because both Clemens and his accuser, Brian McNamee, the trainer, have testified under oath and will testify publicly.

NPR: Clemens Grilled on Capitol Hill

I'll try to find out if we can figure out exactly when it was.

WHITEHOUSE: Press Briefing

"Well, I guess we'll find out, " she said.

CNN: Lady Gaga launches 'slutty' fragrance