day-64 완독 economy-명사-경제, 절약 명사 앞 경제적인/절약형의 economic-형용사-경제학의, 경제의 economical-경제적인/절약하는 어원 eco집 nomy관리 영작 Maybe most people think it would be more economical to buy the bigger size, but if you don’t need a large pack, you should just buy the economy pack.