原级：keel
keels
现在分词：keeling
keels什么意思
过去分词：keeled
过去式：keeled
1. 龙骨：antirolling fins 减摇鳍 | keels 龙骨 | hydrofoils 水翼船
1. Leisure boats'keels could often be heard grating against the riverbed in shallow water late last year.