英语 example sentences with "rarer"

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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True friendships are even rarer than diamonds.
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When Hadrian was emperor, capital punishment became rarer.
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Type Ia supernovae are much rarer, happening roughly once every 500 years in the Milky Way.
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I need a rarer kanji.
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He buys and sells new, used, and old books. The rarer ones, out-of-print editions, are quite expensive.
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