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• [전화영어 1위 한샘에듀 영어명언] 도전할 것인가? 안주할 것인가? - James Ramsey Ullman (Challenge is the core and mainspring of all human activity. it; if there's a wrong, we right it; if there's a record, we break it; and, finally, if there's a mountain blog.naver.com · 2015.01.22
• 도전할 것인가? 안주할 것인가? (Hunet 2012.08.17 제2009호) (Challenge is the core and mainspring of all human activity. it; if there's a wrong, we right it; if there's a record, we break it; and, finally, if there's a mountain blog.naver.com · 2012.08.22
• 삼성 vs 애플 美 특허전 3주차: 마주달리는 폭주기관차, 브레이크가 없다 (Challenge is the core and mainspring of all human activity. it; if there's a wrong, we right it; if there's a record, we break it; and, finally, if there's a mountain blog.naver.com · 2012.08.21