辞書 ポーランド語 - 英語
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być sprawnym 英語で:
1. 
to keep fit
I practice many sports to keep fit.
I try to keep fit by playing sport.
2. be fit
She wants to be fit.
3. get fit
I have to get fit before a trip to the mountains.
I want to lose weight and get fit before my wedding.
I've started going to the gym because I want to get fit.
I want to get fit. I’m so fat.
