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解かい約やく率りつを改かい善ぜんするために、顧こ客きゃく満まん足ぞく度どを上あげる必ひつ要ようがある。

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解かい約やく率りつ

churn rate; contract termination rate

改かい善ぜん

improvement; betterment

noun, suru verb

light/support verb with a noun or noun-like phrase

sake or purpose

-> ためgrammar

顧こ客きゃく満まん足ぞく度ど

customer satisfaction level; degree of customer satisfaction

increase; raise a price; raise a wage

ichidan verb, auxiliary, suffix

必ひつ要よう

necessary; needed; essential

na-adjective, noun

godan verb, auxiliary