słownik polsko - angielski
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co za dużo to niezdrowo po angielsku:
1. 
enough is enough
I tolerated his behaviour for a long time, but enough is enough!
Angielskie słowo "co za dużo to niezdrowo" (enough is enough) występuje w zestawach:
idioms and proverbs2. 
too much of a good thing
A: If I hear that song once more, I think I’ll scream. B: I thought you liked it. A: Yeah, well, you can have too much of a good thing.
A: More wine? B: No, thanks. You can have too much of a good thing.