keel的中文意思、音标与词形变化

n. 龙骨, 平底船 vt. 装以龙骨, 使倾覆 vi. 倾覆

n. a projection or ridge that suggests a keel n. the median ridge on the breastbone of birds that fly n. one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability