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introducing-voya -> introduction
introductiebijee -> introduction
Introduction
INTRODUCTION
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Ⅰ. Introduction 의료기술이 발전해도 치아 우식증과 치주질환 줄지 않고 늘어남 구 강건강 수준은 구강보건에 관한 지식과 태도에 영향을 받게 됨
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概述 （ Introduction ）
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