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In a sentence
Tento plán je rekordne náročný.
This plan is record-breakingly demanding.
Úloha sa zdala rekordne jednoduchá.
The task seemed record-breakingly simple.
Výsledok nás rekordne prekvapil.
The result surprised us record-breakingly.
Počasie sa rekordne zmenilo.
The weather changed record-breakingly.
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Hand-reviewed example sentences.
Full attribution on References.