sliding keel英 [ˈslaɪdɪŋ kiːl]美 [ˈslaɪdɪŋ kiːl]网络 滑动龙骨; 帆船的)滑动龙骨网络英英释义nouna retractable fin keel used on sailboats to prevent drifting to leewardSynonym:centerboardcentreboarddrop keel