☆ ADVANCED LEVEL : 3 ☆☆ INTERMEDIATE LEVEL : 1 ☆☆☆ ELEMENTARY LEVEL : 0 NONE : 42 ALL : 46

• 석유 (石油) : 땅속에서 천연으로 나며 태워서 에너지를 만드는, 주로 자동차나 공장의 연료로 쓰는 검은색의 기름. ☆☆ Noun
🌏 OIL; PETROLEUM: Black oil that sprouts naturally from the ground and is used to make energy by burning; it is usually used as fuel of cars or factories.

• Exchanging personal information (46) • Economics and business administration (273) • Weekends and holidays (47) • Using public institutions (library, post office, etc.) (8) • Describing location (70) • Describing personality (365) • Using public institutions (library) (6) • Geological information (138) • Politics (149) • Comparing cultures (78) • Family events (during national holidays) (2) • School life (208) • Watching a movie (105) • Weather and season (101) • Making a phone call (15) • Science & technology (91) • Hobbies (48) • Using a pharmacy (10) • Family events (57) • Appearance (121) • Environmental issues (226) • Travel (98) • Dating and getting married (19) • Pop culture (52) • Directions (20) • Philosophy, Ethics (86) • Architecture (43) • Expressing time (82) • Introducing (introducing oneself) (52) • Making a promise (4)