낙엽leaf fall 우편엽서postcard 초엽beginning 추풍낙엽fallen leaves in the fall 침엽수needleleaf tree 침엽수림coniferous forest 태엽spring 활엽수broad-leaved tree 금지옥엽precious child 낙엽수deciduous tree

교과서textbook 도서관library 독서reading 서류document; papers 서점bookstore 추천서letter of recommendation; letter of reference 가입서registration documents 계산서check; bill 계약서contract; written agreement 계획서written plan