noun 다운로드 🔗공유 주요 스프링 The principal spring of a clockwork mechanism, which drives it by uncoiling. Examples : "The old clock stopped working because the mainspring was broken. " 오래된 시계는 주요 스프링이 고장나서 작동을 멈췄다. machine part technical device time AI와 채팅어휘 게임독해 연습
noun 다운로드 🔗공유 원동력, 주요 원인 The most important reason for something (Cf. spring "origin of something" (literary) (often in the plural) the springs of her ambition). Examples : "My daughter is the mainspring of my life." 내 딸은 내 삶의 원동력이다. business attitude mind philosophy AI와 채팅어휘 게임독해 연습