關鍵詞
keep together, education, environment, enviroment, european, caucasian, rock, hobby, pupil, learn, schoolgirl, with each other, observe, data, informations, substratums, facts, information, knowledge, ecology, grade of school, confluence, teenager, minerals, fossil, rock formations, geology, absolutely, into one another, object-lesson, bring together, to live together, belong together, master, geography, study further, interest, match, joint together, boys, lessons, coalescent, congregate, alumnus, general education, training system, schooling, interests, total, secondary school qualifications, double, hobbies, companion, affiliate, blend of tea, belted, course of education, learns, instruction, final total, add the interest to the capital, knowledges, state of knowledge, lesson, youth welfare office, stripling, date, dating, get to know, boy, lad, male youngster, cassette, tape, sound carrier, ashamed, embarrassed, group, girlfriend, school, educational institution, educational establishment, institution of education, girl, girls, teens, teenagers, youth, together, stones, puppies, whelps, pupies