| 单词 | 上缘 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔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〔seine〕A large fishing net made to hang vertically in the water by weights at the lower edge and floats at the top.围网：一种垂直悬立在水中的，下缘装有沉子上缘装有浮子的大型鱼网美国传统〔thole pin〕A wooden peg set in pairs in the gunwales of a boat to serve as an oarlock.桨栓：成对地固定在船舷上缘的木栓，用作桨架美国传统 |
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