Oh come on, let's be sensible about this.

哦，得了吧，关于这事我们还是理智一点吧。

《柯林斯英汉双解大词典》

Oh, come on—you know that isn't true!

咳，得了吧，你知道那不是真的！

《牛津词典》

Oh, come on. You're kidding.

哦，得了吧，你开玩笑的吧。

youdao

Oh come on, that's amazing. Two operations.

这很神奇！两次运算。

麻省理工公开课 - 计算机科学及编程导论课程节选

Oh come on! There was a Beta right here.

之前这里有选β的啊

耶鲁公开课 - 博弈论课程节选

Oh come on David, two years ago these same polls that you're quoting said we were going to lose the European elections catastrophically.

BBC: News Online

Because you know Hong Kong traditional anticipation of people: Oh, come on, give me more action, explosion, pah pah pah, that kind of thing.

CNN: Andrew Lau Interview on Talk Asia

Oh, come on. (Laughter.) Go ahead, right here.

WHITEHOUSE: President Obama Holds Town Hall in New Orleans