vitally [副詞]極めて決定的に

1-C. Before refrigerators became common, vinegar was vitally important in preserving food in the form of pickles.Before refrigerators became common, vinegar was vitally important in preserving food in the form of pickles.  

冷蔵庫が一般的になる前に、酢は非常に重要でした、食品の保存にダヨ、形でダヨ、ピクルスのダヨ。  

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