어떤 단어든 아래 칸에서 찾아보세요. 예를 들면 "sex"
 
1.
the study of the environment, all the biotic and abiotic things and the relationships between them.
Today, environautics is has become a useful tool for nature conservation.
uttam maharjan가 작성 2011년 12월 07일 (수)