good gracious
US /ɡʊd ˈɡreɪ.ʃəs/
UK /ɡʊd ˈɡreɪ.ʃəs/

1.
天哪, 哎呀
an exclamation of surprise, alarm, or exasperation
:
•
Good gracious, I completely forgot about our appointment!
天哪,我完全忘了我们的约会!
•
Good gracious, look at the mess you've made!
天哪,看看你弄的这一团糟!