a sail with four corners that is hoisted from a yard that is oblique to the mast
同义词：lug
lugsail详细解释
lug.sail n.Nautical （名词）【航海】 A quadrilateral sail that lacks a boom, has the foot larger than the head, and is bent to a yard hanging obliquely on the mast.斜桁四角帆：没有帆杠，脚比头大，斜挂在桅杆上的桁弯曲的一种平面四角帆 来源：Possibly from lug 可能源自 lug
