noun
usually sing.上桅帆 the sail attached to the upper part of the mast of a ship
数据来源：WordNet
He will is in his small boat , Topsail .
他将乘坐在自己的涛波赛尔号小船里。
A triangular topsail with its foot along the gaff and its luff on the topmast .
根部在船的斜桁并且其转舵在上部的三角形的上桅帆。
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