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noun (common) (futsuumeishi), noun or participle which takes the aux. verb suru, intransitive verb
dramatic decrease, sharp drop, sudden fall
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先進国では虫歯が激減し、自分の歯で一生食べられる人が増えています。
Cavities have become rarer in the developed countries and more people will be able to eat with their own teeth throughout their life.
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