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一変 / いっぺん : n vs 1）complete change 2）about-face P
一千 / いっせん : n 1）1,000 2）one thousand P
一夜 / いちや / ひとや / ひとよ : n-adv n-t 1）one night 2）all night 3）overnight 4）one evening P
一夕 / いっせき : n-adv n-t 1）one evening 2）some evenings
一夏 / いちげ : n 1）(Buddh) one summer (during which a monk attends a summer retreat)
一変量 / いちへんりょう : 1）univariate
一声 / いっせい / ひとこえ : n 1）voice 2）cry 3）shout
一士 / いっし : n 1）private first-class (JSDF)
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一変

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