noun 다운로드 🔗공유 밑바닥 The floor structure supporting and underlying the visible flooring or other finishing surface such as a carpet Examples : "The plumber had to cut a hole in the kitchen floor to fix the pipes, revealing the plywood subfloor underneath. " 배관공은 파이프를 고치기 위해 부엌 바닥에 구멍을 내야 했고, 그 아래 합판 밑바닥이 드러났다. building architecture material structure AI와 채팅어휘 게임독해 연습