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In a sentence
Cvičenie posilňuje svaly chrbta.
Exercise strengthens the back muscles.
Pravidelné cvičenie posilňuje celé telo.
Regular exercise strengthens the whole body.
Spolupráca posilňuje vzťahy medzi ľuďmi.
Cooperation strengthens relationships between people.
Cvičením posilňuje chrbát a nohy.
Through exercise he strengthens his back and legs.
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Hand-reviewed example sentences.
Full attribution on References.