치약toothpaste 충치tooth cavity; decayed tooth; carious tooth 치teeth 치석tartar; scale; plaque 치아tooth 치열tooth arrangement; row of teeth 치통toothache 유치milk tooth 의치artificial tooth; denture 절치부심strong desire to take revenge

교과서textbook 내과internal department 피부과dermatology; department of dermatology 학과major; department 경영학과Department of Business Administration 경제학과Department of Economics 과목subject 과장head; chief; director; supervisor 과학science 과학관science museum