| 单词 | upper edge |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔fore-and-aft sail〕A sail set parallel with the keel of a vessel, having the foremost edge or luff attached to the mast with travelers and the upper edge set on a gaff or stay.纵帆：安装与船的龙骨并行的船帆，帆的最前方或前缘与活环一起固着在桅杆上，上面部分安在桅斜桁上或支索上美国传统〔gaff rig〕A rig with a fore-and-aft sail that has its upper edge supported by a gaff.斜街帆装：一种上缘由斜桁支撑的纵向帆装美国传统〔gaff〕Nautical A spar attached to the mast and used to extend the upper edge of a fore-and-aft sail.【航海】 桅上斜杆，圆桁：一种用于拉长纵帆上缘的系于桅杆上的圆木美国传统〔gunwale〕The upper edge of the side of a vessel.舷缘：船只侧面的上部边缘美国传统〔head〕The top part or upper edge of a sail.船帆的上部或顶缘美国传统 |
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