chance upon 썸네일형 리스트형 성문종합영어단문독헤(형용사1) 1-65 단문 1-65 (형용사1) Among the greatest discoveries of science not a few have been made by accident. Setting out to reach a certain goal, the investigator chances in his way upon a law, an element, that had no place in his purpose. The discovery is a by-product of his activity. 더보기 이전 1 다음