침대 프레임 위에 올려놓거나 바닥에 깔아 잠을 잘 때 몸을 받쳐 주는 두툼하고 탄력 있는 침구.
A large, rectangular pad for supporting the reclining body, used as or on a bed.
예문:
"Investing in a high-quality mattress can significantly improve your sleep quality."
"They decided to buy a firm mattress to help alleviate his chronic back pain."
"We need to replace the old mattress because the springs are starting to poke through."
토목 공사에서 기초를 보강하거나 제방의 침식을 방지하기 위해 섶나무, 콘크리트, 합성 수지 등으로 만든 평평한 구조물.
A protective structure made of various materials used in engineering to support foundations or protect against erosion.
예문:
"The engineers used a concrete mattress to stabilize the seabed before laying the pipeline."
"A brushwood mattress was placed along the riverbank to prevent soil erosion during the floods."