słownik polsko - angielski
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duża sprawa po angielsku:
1. 
big deal
No big deal
Moving to another country is a big deal.
She's getting a new job. It's a big deal for her.
So if we're able to do something with cities, that's a big deal.
A new baby is a big deal around the office.
Angielskie słowo "duża sprawa" (big deal) występuje w zestawach:
kartkowka 5 tylko ze po polsku pytania2. 
big time
This is my big time.