☆ ADVANCED LEVEL : 0 ☆☆ INTERMEDIATE LEVEL : 0 ☆☆☆ ELEMENTARY LEVEL : 0 NONE : 1 ALL : 1

• 기하급수 (幾何級數) : 수나 양이 매우 빠른 속도로 많아짐. Noun
🌏 GEOMETRIC PROGRESSION: Sharp increase in quantity or volume.

• Introducing (introducing oneself) (52) • Philosophy, Ethics (86) • Expressing day of the week (13) • Ordering food (132) • Hobbies (48) • Describing events, accidents, disasters (43) • Religion (43) • Sports (88) • Using transportation (124) • Describing physical features (97) • Comparing cultures (78) • Human relationships (255) • Health (155) • Describing clothes (110) • Economics and business administration (273) • Mentality (191) • Dietary culture (104) • Housework (48) • Weekends and holidays (47) • Making a phone call (15) • Expressing emotion/feelings (41) • School life (208) • Marriage and love (28) • Using a pharmacy (10) • Travel (98) • History (92) • Introducing (introducing family) (41) • Environmental issues (226) • Exchanging personal information (46) • Education (151)